Professional Housebuilder & Property Developer July/August 2025
SPECIAL REPORTS
● Next Level underfloor
● Communal heating systems
● Ventilation ducting
ROOFING, CLADDING & INSULATION
GROUNDWORKS & PLANT
10 Taking it to the next level
How Next Level is pioneering the latest
25 Mind the gap
Future-ready homes demand insulation solutions that deliver more than just thermal metrics.
26 Breath of fresh air
Insulation and indoor air quality?
Knauf Insulation explores the link
28 Here comes the sun
PHPD talks to Catnic about Solarseam, a bonded integrated solar solution that’s easy on the eye
GROUNDWORKS & PLANT
30 The game’s afoot
MEC Consulting Group explores ground investigation best practice.
32 Walking on water
PHPD talks to Bioscapes about the rising SuDS responsibility and how forward-thinking housebuilders can best benefit from it.
34 A trusty workhorse
PHPD hears from Meynell Plant
Hire on how its JCB backhoe fleet has been supporting Jelson Holdings’ housebuilding activity since 1956
37 Growing concerns
Grass Concrete discusses smart permeability and grass paving
38 A grade above
PHPD finds out how one civil engineering & groundworks company is benefitting from GPS controlled grading attachments on its latest Bobcat acquisitions
41 Breaking ground
PHPD talks to Takeuchi’s Marketing Manager, Holly Cooke, about Takeuchi excavators and how they can help with groundworks
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M i l i b a n d a n n o u n c e d t h e A u t u m n r e l e a s e o f 2 0 2 5 ' s F u t u r e H o m e
S t a n d a r d ( F H S ) . C o m p u l s o r y s o l a r p a n e l i n s t a l l a t i o n o n n e w b u i l d s w h e r e a l s o
c o n f i r m e d t o b e a p a r t o f t h e u p d a t e T h e e x c e p t i o n s t o t h i s r u l e w i l l b e w h e r e P V
i s n ' t f e a s i b l e d u e t o s h a d e o r o t h e r c o n s i d e r a t i o n s t h a t r e n d e r s u n - s o u r c i n g
e n e r g y i m p r a c t i c a l .
T h e p r e v i o u s G o v e r n m e n t t o y e d w i t h j u s t t h i s i d e a a n d p o t e n t i a l l y m a n d a t i n g
4 0 % o f a r o o f t o b e c o v e r e d w i t h s o l a r P V W h e n p r e s s e d o n w h e t h e r t h e F H S
w o u l d f o l l o w t h i s r u l e , M i l i b a n d a d v i s e d t h a t t i m e w i l l t e l l , a n d w e ' r e t o f i n d o u t
t h i s A u t u m n H e d i d s t r e s s t h o u g h t h a t t h e p r e v i o u s p r o p o s e d r u l e , t h a t i f 4 0 %
w a s u n a c h i e v a b l e s o l a r i n s t a l l a t i o n c o u l d b e s c r a p p e d , w o u l d n o t b e p a r t o f t h e n e w r e g s What to make of this then? Well, for the most part this is a big positive for the industry If net zero is to ever be achieved, these kinds of changes are going to be key, particularly for larger properties Add to this the ever choking cost of energy for homeowners (Miliband suggested the typical homeowner could save £500 a year on
bills with solar) and you have a recipe for success As we all know, the general heating trend will be towards heat pumps powered by electricity, which currently
costs almost four times as much as gas per kWh. Finding inventive, and cost effective, ways to source this electricity and potentially store it will be key to future satisfaction
Where doubts and eyebrows are being raised is with the context of these added regulations For all its faults, this Labour government has been incredibly active in the construction/ housebuilding industry, and while this focus is a welcome change from the 14 years prior, it means that each month or even week represents a new announcement and a new consideration for our nation's builders. (I'm sure that by
the time of reading this, there'll be a new update to digest) So just how will this affect how fast our homes are built?
Quality will always remain of paramount importance when constructing properties.
Yet, there's ever increasing pressure to build more homes, faster How does a workforce that’s at least 250,000 people short rise to meet this demand? Particularly
in a climate where it has more and more hurdles to leap over and red tape to cross
Building safety and sustainability goals are tremendously important for our future and there's a huge responsibility there in the industry, but t
STAY IN THE LOOP
Superglass
partners with
The
Pallet LOOP
From early April, the manufacturer’s cured glass mineral wool insulation products have been distributed on The Pallet LOOP’s distinctive green pallets, which are designed to be collected and put back into the building materials supply chain again and again Theresa McLean, Etex UK Insulation Leader, said: “Having the opportunity to reduce hundreds of tonnes of waste within our supply chain made joining The Pallet LOOP an easy decision for us. By partnering with The Pallet LOOP, we can, crucially, lower the amount of construction waste that goes to landfill ” For more information go to www.rdr.link/dbe001
FUTURE INVESTMENT
CITB confirms major investment in National Construction College sites
NCC investment over the next three years will total £39 million for the sites at Erith, Bircham and Inchinnan. This investment will create substantial value for the construction industry through an expanded training offer, outstanding teaching, learning and support, and beacon leadership across the wider training sector The investment also includes new programmes and pathways developed in line with industry needs, making NCC a provider of choice for large-scale infrastructure projects For more information go to www.rdr.link/dbe002
SUNNY SIDE UP
The Government announces that Future Homes Standard will explicitly promote the installation of solar panels on new homes for the first time, subject to practical limits.
Commenting on the news, Richard Beresford, Chief Executive of the National Federation of Builders (NFB), said:
“The main barriers to mandating solar panels on all new buildings are grid costs and grid delays Although not yet fully resolved, the Government has made real progress to fixing those issues, particularly through changes to the connection process, and planning reforms that ensure grid infrastructure funding goes further and faster If grid connections are timely and not cost prohibitive, solar for new buildings is deliverable and we support that ambition We urge the Government to ensure planning is reformed so that councils
Bellway’s Future Hub launches to give practical insight on how to build allelectric low-carbon homes
The Future Hub at Barton Quarter in Horwich, near Bolton, is a collection of four houses, demonstrating how heating, power, energy conservation, ventilation and the building materials themselves are expected to perform when the Government’s Future Homes Standard is introduced
The homes are built in the style of Bellway’s House to Home plots, with
POSITIVE CHANGE
TheFMB reacts to reforms to the UK planning system
Jeremy Gray, Head of External Affairs at the FMB said: "This is a big change for the planning system and one that acknowledges the hardships faced by SME house builders over the last few decades, which have resulted in their decline The UK’s small house builders stand ready to deliver the homes Britain needs, but the planning system has stifled their growth The FMB has long called for reform to the planning system to support SMEs, and so the decision to streamline
cannot oppose solar on the grounds of being out of character ”
Also commenting is David Woon, head of net zero engineering and operations at Ennovus Solutions: "This is incredibly positive news, and I agree that it makes sense for all new builds to incorporate solar energy However, the true benefit will be realised if this mandate is implemented in a way that maximises the potential of each installation, rather than simply meeting a minimum requirement We too often observe new builds fitted with just one or two panels, which significantly limits the long-term advantages for both the homeowner and the environment ”
For more on the announcement visit www.rdr.link/dbe003
elements left uncovered to show the workings of the different systems The Future Hub will serve as a training centre for teams from Bellway, its subcontractors and the wider industry.
For more information go to www.rdr.link/dbe004
requirements on sites of up to nine homes, alongside faster decision making is a positive step. The medium site designation will also be welcomed as it reduces planning hurdles, enabling small house builders to scale up their businesses."
For more information go to www.rdr.link/dbe005
CASH FLOW CHOP CHOP
Award-winning SME housebuilder calls for fast implementation of reforms
Sophie Horgan, director of Midlandbased Horgan Homes, gave a cautious welcome to June's planning and building announcements – but says the Government’s track record means timing might be an issue
“These proposals are a welcome step in the right direction. But when you look at the devastating decline in small, regional builders – from 12,000 in the late 1980s to fewer than 2,500 today – the Government needs to move faster than the current planning system does!
"The true test will be in the delivery We need more than good intentions – we need a fundamental shift in how local and national government approach housebuilding, with SMEs recognised as essential partners in solving the housing crisis"
Hampshire Trust Bank writes guide on benefits of revolving credit facilities
Neil Leitch, Managing Director of Development Finance at Hampshire Trust Bank, has penned a piece explaining why SME developers should be taking a look at revolving credit facilities and how they can help housebuilders to react quickly to changes
For more information go to
www.rdr.link/dbe006
COMPLIANCE CHALLENGE
Compliance confusion puts building sector success at risk, survey reveals
Results of a new survey of UK timber frame manufacturers, published by MEDITE SMARTPLY and the Structural Timber Association, reveal a sector with growing pressure on its shoulders and diminishing clarity about how to meet it
The full report of results, Framing the future: The state of timber frame construction, is available now on the MEDITE SMARTPLY website
The survey captures responses from over 80 timber frame manufacturers working across residential, social housing and education Although there
is a clear desire to meet higher performance standards, many respondents pointed to a disconnect between policy ambition and the practical realities of delivery.
To read the report visit
www.rdr.link/dbe007
LOCAL RECOGNITION
P applauds zero carbon homes by regional housebuilder
a
As a long-standing advocate for environmental sustainability, Mr Mathew donned his hard hat to see how the Gloucestershire-based housebuilder is delivering zero carbon, highly energy efficient homes in rural Wiltshire “‘These are the sort of homes we need to be building more of around the country” says the MP For more information go to www.rdr.link/dbe008
To read the full article visit
www.rdr.link/dbe009
ALL SHAPES AND SIZES
The NFB reacts to the introduction of ‘medium’ sized builders
The Government has announced a package of proposals to directly help small and medium sized builders (SMEs) and they include a ‘Medium’ sized site definition to enable more proportionate planning requirements, streamlined planning for ‘Minor’ sized sites and more targeted support for access to land and finance
Richard Beresford, Chief Executive of the National Federation of Builders (NFB), said: “This is a huge win for the NFB I am immensely proud of our housebuilding members and staff for never giving up on their campaign for a ‘Medium’ sized site definition of between ten and 49 homes ”
To read the full article visit www.rdr.link/dbe010
DETAILED PLANNING GRANTED
Dorset-based developer, AJC Group has secured Reserved
Matters planning approval for 48 new homes in Glue Hill Sturminster Newton, Dorset The detached, semi-detached, and terraced houses champion energy efficiency with electric vehicle charging points, high-efficiency insulation, and sustainable water use. At the same time, a variety of materials, including brick, flint, painted brick, render, and slate roofs, deliver an attractive streetscape For more information go to www.rdr.link/dbe011
LINCOLNSHIRE DEVELOPER PLANTS ROOTS
Regional housebuilder, Allison Homes East has hosted a ceremonial ‘Framing the Future’ tree planting event to celebrate the progress of its upcoming Manthorpe Chase development in Manthorpe, Grantham. Situated on Belton Lane, Manthorpe Chase will consist of 480 two-, three-, four- and five-bedroom homes including open market homes and a selection of affordable homes For more information go to www.rdr.link/dbe012
FIRST-TIME BUYERS SCHEME
First-time buyers have an exciting opportunity to step onto the property ladder at a reduced cost through the government’s First Homes scheme, available at Barratt Homes’ Affinity development in Waverley. Exclusive to brand-new properties, the First Homes scheme is designed to help local first-time buyers and key workers purchase a home with a 30% discount compared to market value For more information go to www.rdr.link/dbe013
MORRISH HOMES LAUNCHES SHOW HOME
Set in a peaceful countryside location – and just three miles from the market town of Romsey –the inaugural Mountbatten Park show home from Morrish Homes features a spacious, well-considered layout ideal for modern family life Highlights include a light-filled, dual-aspect living room, an open-plan kitchen/dining room with integrated appliances, three generously sized double bedrooms with an en-suite to the principal bedroom, and a fourth bedroom dressed as a hobby room For more information go to www.rdr.link/dbe014
CAMERON HOMES ANNOUNCES NEW DEVELOPMENT
Semi-rural living with great connectivity is how The Laurels development in Brailsford is characterised The spacious Cameron Homes site features a mix of two, three and four-bedroom semidetached and detached homes with communal green spaces Brailsford is a small rural village situated 20 minutes from Derby and 10 minutes from Ashbourne.
For more information go to www.rdr.link/dbe015
HONEY GRANTED PLANNING
Housebuilder, Honey will build 275 new homes in Duckmanton after being granted planning permission for a £78m development. Called Pearl, it will feature 18 of Honey’s different house types, including terrace, semidetached and detached properties. The 41-acre site has been allocated for development by Chesterfield Borough Council as part of the Chesterfield local plan to deliver 4,080 homes by 2035
For more information go to www.rdr.link/dbe017
CONSERO ACQUIRES 38-ACRE SITE
The luxury developer of super-prime homes has completed the acquisition of a prestigious 38-acre site on Stroude Road in Virginia Water, to create an exclusive gated community The acquisition marks a significant addition to Consero’s growing portfolio of high-end, design-led residential developments in the world-renowned Wentworth Estate and across Surrey and the south-east.
For more information go to www.rdr.link/dbe018
FIRE SAFETY
The Structural Timber Association (STA) discusses planning for fire safety in timber construction and why separation distances matter
HOUSEBUILDER SET TO INVEST £102 million
Keepmoat is investing more than £102 million into a 604 property housing regeneration scheme at the former Boots site in Nottingham, now named Beeston Canalside, following a partnership with Platform Housing Group The multi-million pound site will deliver new, energy-efficient and affordable homes, transforming the disused brownfield land
For more information go to www.rdr.link/dbe019
b e
D e s i g n G u i d e t o S e p a r a t i n
C o n s t r u c t i o n ( V e r s i o n 3 3 )
This guide helps project teams assess and manage fire risk from the earliest design stages. It introduces three categories of timber frame construction: A, B, and C each reflecting different levels of fire mitigation The guide offers clear tables and examples to determine safe distances between timber frame buildings under construction and neighbouring properties It also outlines how to reduce these distances through design choices, such as using fireresistant materials or specific build methods. Endorsed by the Health and Safety Executive and the Construction Insurance Risk Engineers Group, this document is a trusted reference for ensuring safety on site. D e s i g n G u i d e t
Part 4 extends our guidance to include Cross Laminated Timber (CLT) and other solid timber panel systems It introduces a new category: CLT for buildings constructed with robust, fire-resistant solid timber panels. This guide provides tailored separation distance tables and risk mitigation strategies specific to CLT construction It’s particularly relevant for projects like schools, flats, and civic buildings where CLT is increasingly used
TAKING IT TO THE NEXT LEVEL
This feature looks at the advantages of underfloor heating, its growing popularity in sustainable new build projects, and how Next Level is pioneering the latest heating technologies to meet today’s requirements for greener, smarter buildings
With the construction industry turning toward greener methods, energy-saving technologies have become an increasingly popular element in the design and specification of new homes
One such innovation is underfloor heating (UFH)
The sustainability benefits of underfloor heating
The environmental impact of underfloor heating extends beyond its ability to distribute heat effectively Here’s why more and more developers are choosing it to help them meet stricter and stricter energy codes:
Energy efficiency
Longer system lifespan
Underfloor heating is long-lasting and low-maintenance Correctly installed, UFH lasts for years and years, reducing the environmental cost of the manufacture, installation and disposal of heating systems And as there are no moving parts, UFH systems are less likely to go wrong than other heating systems
Why developers should choose underfloor heating
er carbon emissions
and cheaper utilities for homeowners
In short, uniform heat circulation also eliminates cold spots and warms up the entire room, so you can stay warm without warming the room or setting the heat at a much higher level This minimises energy wastage and improves a building's overall efficiency
Lower carbon footprint
Underfloor heating’s increasing popularity is mainly due to one of the largest drivers of home building: sustainability Its efficient operation helps to reduce buildings' carbon emissions
Cost-effective for new builds
Underfloor heating delivers cost savings when incorporated at a new build stage versus installing traditional radiator heating at a later date By incorporating it into the floor design, developers can dispense with the extra expense of space and materials usually consumed by radiators and their pipework. When installed early in the build process, the system cost can be easier to bundle into a mortgage, while long-term energy savings provide overall market value
Space-saving design
Developers who wish to maximise the available space in their properties have so
much to gain from using underfloor heating systems Developers can cover more wall space, as they don’t need to incorporate clunky radiators or other methods of providing warm air into the room This is especially useful in small houses or apartments where every single square metre makes a difference It can also be installed on a range of flooring types, including tiles and wood, so there are no aesthetic compromises to make for the sake of practicality
Enhancing property appeal
As more house buyers become more environmentally and budget-conscious, properties with energy-efficient heating systems like underfloor systems are bound to garner more attention On a purely aesthetic basis, the lack of radiators would also be a feature in more modern houses More and more buyers are focused on sustainable homes, so underfloor heating in new builds adds an instant value to your property that can be enjoyed long-term
Next Level: Innovation in underfloor heating solutions
Next Level specialises in underfloor heating and floor screeding in Scotland Whether you need an underfloor heating installation in a big city like Edinburgh or in a smaller area, Next Level can fully help you transform your heating and comfort to a new level with a series of ultra-efficient, ecological and fast-to-fit products
Here’s how Next Level stands out in the underfloor heating sector:
Advanced heat distribution technology
Eco-friendly and energy-efficient solutions
Sustainability is prioritised, with all structures built to be as energy efficient as possible. The solutions work with renewables and are perfect for developers wanting to cut carbon and comply with environmental legislation.
Seamless integration with modern building practices
N e x t L e v e l h y d r o n i c u n d e
n – a n d
t u r n a r o u n d t i m e s – p r e v e n t s
c o n s t r u c t i o n s c h e d u l e s f r o m b r e a k i n g
The future of sustainable
heating
W h e n y o u w o r k i n a s e c t o r t h a t n o w h a s
a n e n v i r o n m e n t a l c o n s c i e n c e ,
u
For housebuilders considering specifying underfloor heating in their next development, Next Level has the experience and solutions to provide a comfortable, energy-efficient future for newly built developments
Heat networks are a core component of the UK’s net zero strategy, thanks to their potential to provide highly efficient, low carbon heat at scale. A lack of knowledge about these systems is getting small developers into hot water, warns Jarrad Bedford, Head of Sales: O&M, at Insite Energy.
NETWORKING EVENT
In order to speed up heat network construction in urban centres, zones are being designated across England within which new housing developments are required to connect One consequence of this is that more and more developers, from SMEs to large corporations, are finding themselves grappling with these highly complex, bigticket assets for the first time, often with little understanding of the technologies involved Many, particularly smaller organisations, prefer to fully outsource the design of their heat network to a building contractor in order to focus on the more visible and familiar aspects of their project’s architecture. This means, however, they’re reliant on their supplier to ensure their installation is regulationscompliant and within budget
Skills shortage
The problem is, the rapid rise in the number of new heat networks is outstripping the market’s capacity to provide experts to design, operate and maintain them to function well – which means far too many don’t According to the Heat Trust, the majority are only 35-45% efficient, when this should be closer to 65-70%
This frequently leads to painfully high energy bills, excessive emissions and unhappy residents In the worst cases, it can even be dangerous.
As a case in point, when we were recently appointed as the energy services company (ESCo) for a new luxury apartment block in North London, we had to shut down the entire system immediately The subterranean plant room had been constructed without any ventilation apart from a oscillating pedestal fan plugged into the wall! This was utterly insufficient, non-compliant and unsafe due to the risk of gas leaks and air quality
Mitigating risks
So, what can smaller property developers do to avoid facing these kinds of expensive and damaging issues?
Gen up – first and foremost, get an understanding of what you are dealing with The government has so far provided little in the form of support to help organisations understand what’s involved The onus is therefore on housing providers to educate themselves about the technology There’s a lot of information out there, including our own heat network resources portal.
Prioritise maintenance – a heat network is a bit like a luxury car; it is an expensive asset that needs skilful and consistent servicing Ideally this should be done via a planned preventative maintenance (PPM) contract with a heatnetwork-specialist supplier Bear in mind equipment warranties will likely be void if items aren’t serviced annually, including during the first year after commissioning.
Above all, don’t stick your head in the sand If you’re developing properties in urban areas, you need to be across this. It’s far better to understand from the outset what that means in practice
WAN T TO KNOW MORE?
The latest Builders Merchant Building Index (BMBI) report, published in June, shows builders’ merchants’ value sales in April were up +3.0% compared to April 2024. Volumes increased +3.4% year-on-year, while prices eased -0.3%. With one less trading day in the most recent period, like-for-like value sales – which take trading day differences into account - were up +8.2%.
Year-on-Year
Seven of the twelve categories sold more compared to April last year, with seasonal category Landscaping (+13 3%) well ahead of the rest Workwear & Safetywear (+8 7%), Miscellaneous (+5.3%) and Heavy Building Materials (+3 7%) performed well Timber & Joinery Products (+1 7%) also sold more but less than Total Merchants. The weakest categories were Decorating (-3 3%) and Plumbing Heating & Electrical (-3 9%)
Month-on-month
Value sales in April were +0 9% above the previous month’s sales Month-on-month, volume sales were flat at -0 2%, and prices increased +1 0% Just four categories sold more compared to March, with Landscaping (+15.6%) and Workwear & Safety (+6.0%) ahead the most The two largest categories – Timber & Joinery Products (+0.7%) and Heavy Building Materials (+0.1%) sold more but underperformed compared to Total Merchants Decorating was down3 2% With one less trading day in April, likefor-like value sales were +5 9% up
Latest 12 months
Total value sales in the 12 months May 2024 to April 2025 were down -2 3% on the previous 12-month period (May 2023 to April 2024). Volume sales dropped1 5% and prices were -0 8% lower Five of the twelve categories sold more with Workwear & Safetywear and Tools (both +5 3%) out in front, followed by Services (+3 5%), Miscellaneous (+0 8%) and Landscaping (+0 2%) Timber & Joinery Products (-4 2%) and Heavy Building Materials (-2 6%) declined more than Total
Merchants Decorating slipped -1 0%, while Renewables & Water Saving (-16 4%) was the weakest category
Paul Edworthy, Commercial Lead: Builders Merchant Group, Dulux Trade and BMBI’s Expert for Paint commented: “The paint industry was initially optimistic about the prospects for 2025, but it has been an uncertain start to the year, with global turmoil overshadowing what was predicted to be a year of recovery for UK construction and housebuilding, in particular
“The Construction Products Association Spring Forecast noted that any uplift in overall construction outputs this year will now be very gradual – just +1 9% growth is predicted from a low base Private housing output, still challenged by affordability constraints and weak demand, is forecast to increase by just +4 0% The industry had hoped for better in 2025, given Government commitments to housebuilding, and RMI has also had a sluggish start
“But the year is not a write off
According to Aviva’s How We Live report, almost seven million homeowners plan to renovate their home in 2025 Wages are rising faster than inflation, and further rate cuts are expected. However, politics at home and abroad weighed heavy on consumer sentiment ”
WAN T TO KNOW MORE?
BMBI Experts speak exclusively for their markets, explaining trends, issues and opportunities For the latest reports, Expert comments and Round Table videos, visit www.rdr.link/dbe022
Paul Williams, Domus Ventilation Product Manager, looks at ventilation ducting in new builds and why it’s often overlooked and undervalued.
LET IT BREATHE
Ducting can make or break a ventilation system, whether it’s a sophisticated Mechanical Ventilation with Heat Recovery (MVHR) system in a large house or a simple bathroom fan in an apartment That’s because the ducting conveys the allimportant fresh air to (and from, in the case of MVHR) the ventilation unit and into the property If the air flow is impeded in the duct run, insufficient air reaches the fan in a timely way, and the property does not receive adequate ventilation Maintaining air flow at a set level is especially important in whole house ventilation systems as otherwise the systems will not perform to their best ability
Choose ducting wisely
I’d like to think that developers and HVAC contractors invest time into researching whole house ventilation systems and, hopefully, into their choice of extract fans But has similar time and effort been spent into researching ducting? Quite possibly not As I have stated above, ducting is at the heart of a successful ventilation system, so it is important to take the time to ensure you choose duct systems wisely
There is no set standard for ducting, but poor quality ducting is relatively easy to spot If the ducting bows or looks like it’s concave, or the wall thickness appears uneven, it will not provide a tight fit when connected, leading to air and even condensation leakage Good quality ducting will have exacting tolerances and connects together for minimal air and moisture loss and maximum system efficiency
Make sure the ducting has been designed to work in harmony as part of a system and has been third party tested for end-to-end system performance
For MVHR and MEV systems, quality rigid ducting in larger sizes should be used But whatever you do, and whatever size the ventilation system, avoid using flexible duct work in place of rigid ducting at all times, as it causes a lot more air resistance and can be crushed easily.
Drawing duct schemes require skill
Many people misjudge the level of skill required to produce ducting drawings The duct runs, the number of bends and the angle of those bends, plus the temperature of the areas the ducting runs through, all
affect the air flow I important to keep ductwork runs as short and straight as possible, and minimise the number of bends. This can best be achieved if the drawing is produced before the ventilation unit is specified and before services, such as gas and water pipes, go in Make full reference to dwelling and room ventilation rates within the drawing
By far the easiest option though is to outsource the drawing. Most manufacturers, Domus Ventilation included, will provide a system drawing free of charge, along with duct take-offs and estimations
Lastly, be prepared! Site related constraints may change, and the duct drawing may need to alter If changes have to be made, the air flow rates need to be re calculated and, where necessary, product changes accordingly For example, if you must include a bend where one didn’t exist before, consider using something like a Domus Greenline Bend which has been cleverly engineered to reduce duct bend resistance by up to 60%
Stick to the plan when it comes to installation
Once the duct drawing is finalised and the ducting is ready to be installed, be sure contractors stick to it on site It has been
fitted, as laid out in Building Regulations. Insulation is required where the ducting passes through unheated areas and voids, such as loft spaces Firestopping products are necessary whenever a hole is made in a compartment wall for plastic ventilation ducting to pass through In addition, non-combustible air bricks, such as Domus Ventilation’s Solis Air Brick, must be used where ductwork penetrates through the external cavity when above 18m in England and 11m in Scotland
Take care of your ducting and it will take care of you
Getting the ducting right really is one of the most important aspects of a residential ventilation system, yet it’s frequently the most overlooked and undervalued By taking the time to consider ducting products, where they go and how they are installed, you are more than halfway to ensuring a good ventilation system that is Building Regulations compliant.
WEATHERING THE STORM
Steve Skeldon, Product Manager at leading plumbing and drainage manufacturer, Wavin, shares his insight on the importance of effective residential rainwater systems in dealing unpredictable weather patterns.
The UK’s recent weather has highlighted the critical need for effective rainwater management systems in residential construction September 2024 brought recordbreaking rainfall to southern England, with the Met Office confirming it as the wettest September on record for 10 counties These extreme conditions were part of a year marked by significant weather variability, with extended dry periods abruptly followed by intense downpours, creating mounting challenges for homes and infrastructure
Rising to the challenge
It’s no secret that the UK has been experiencing increasing levels of rainfall annually This worrying trend, highlighted by the record-breaking September rainfall last year, underscores the necessity of investing in robust rainwater gutter systems for new housing developments. The challenge for housebuilders is to specify systems that provide optimal protection while maintaining the aesthetic appeal crucial to attracting buyers
Effective gutter systems are essential for safeguarding properties against potential water damage, which can lead to structural issues, mould growth and increased maintenance costs The science behind these systems involves directing rainfall from the building’s roof to an underground
drainage system through gutters and drainpipes However, the efficacy of this process hinges on the system’s capacity to handle the water volume from the roof, making system specifications a key consideration above ground.
Efficiency in rainwater management
Ensuring a gutter system’s effectiveness requires careful planning and consideration of several key factors
Critical components influencing a system’s capacity to handle the water volume it encounters include the gutter’s flow rate, its layout and the number and placement of drainage outlets
The building’s architectural style also impacts the gutter installation process For instance, level or angled gutters may reduce overall capacity compared to straight runs, which can maximise system functionality. By taking these elements into account, housebuilders can select systems that not only meet rainfall demands but also enhance efficiency and longevity.
Housebuilders and developers must also consider local rainfall patterns Areas prone to heavy rainfall will require higher capacity gutters and downpipes, such as Wavin’s Osma DeepLine, which features a hydrodynamic outlet, to manage the increased water volume effectively This ensures that homes remain protected
even during extreme weather conditions, reducing the risk of water ingress and associated damage
However, the responsibility for a successful gutter system continues long after the build is completed Regular inspection and cleaning of gutters and downpipes are crucial to prevent blockages and ensure a system operates efficiently. Housebuilders should persist with educating homeowners about the significance of these maintenance activities to prolong the life and effectiveness of their rainwater management systems
Balancing functionality and aesthetics
The aesthetic integration of guttering systems is increasingly significant in modern housebuilding Homebuyers are not only looking for functionality but also for properties that offer visual appeal. High-quality rainwater systems that blend seamlessly with a building’s design can significantly enhance curb appeal and property value For example, Wavin’s Osma StormLine range features a classic ogee shape that combines optimum performance with visual appeal. The highfronted gutter profile conceals the edge of roof tiles and optional hidden hanging brackets, for a sleek, attractive roofline.
Innovative features, such as the Flexiclip and unique concealing sockets, also make it easier and neater to connect gutters to fittings, ensuring a clean, permanently watertight joint that’s guaranteed to perform when installed correctly. These features not only improve the system’s functionality but also ensure that the installation does not detract from the overall aesthetic of the property.
The choice of materials for rainwater management systems can also impact both their performance and visual appeal Modern formulations of PVC-U, offer durability and a range of colours and finishes, allowing housebuilders to match the system with the building’s design seamlessly These materials are also resistant to corrosion and UV damage, ensuring long-lasting performance and minimal maintenance
Adapting to changing climate patterns
The recent rainfall levels in the UK highlight the importance of effective rainwater management in housebuilding –particularly for those systems collecting water above ground High-capacity residential guttering and drainage solutions, provide essential protection against the adverse effects of extreme weather patterns and the potential for increased rainfall By investing in these systems, housebuilders can enhance the resilience of new developments, protecting homes from water damage and future structural issues
As the UK continues to experience more frequent and intense rainfall, the need for robust, efficient and attractive rainwater systems in new housing developments is more urgent than ever
For more information about the Wavin Osma range, please visit www.rdr.link/dbe024
TOPPING OUT
Jonathan Ducker, Head of Regulatory Affairs at Kingspan Insulation, discusses the growing trend of rooms in the roof in new builds and how the Future Homes Standard is set to affect it.
When designing rooms in the roof as part of new builds, the first consideration tends to be around headroom Many developers typically aim for a headroom of at least 2 3 – 2 4 metres below the ridge and integrate dormers to maximise overall headroom within the space
The thermal performance of the roof also needs to be carefully planned Under Approved Document L 2021 (ADL 2021) in England, the Notional Dwelling specification sets a roof U-value of 0 11 W/m2K for new domestic roofs This specification is applied to a theoretical building of the same dimensions as the proposed home within the energy modelling software to generate the performance targets for the building Developers are free to vary from this specification providing they meet the performance targets, limiting values (0.16 W/m2K for domestic roofs) and any other mandatory requirements
It's worth noting that we’re expecting the Future Homes Standard (FHS) in England to be published before the end of this year – the Government has stated that this will be published ‘in the Autumn’ Whilst we are still awaiting the final text, the Government has recently announced that new homes will have low-carbon heating, such as heat pumps, together with high levels of energy efficiency, in order to cut people’s energy bills and to boost the nation’s energy security They have also noted that the Future Homes Standard will explicitly promote solar, subject to practical limits, with flexibility for new homes surrounded by trees or with lots of shade overhead
With the switch to low carbon heating appliances, which perform most efficiently
at lower flow temperatures than conventional boilers, ensuring homes retain heat well will be vital to enabling them to be heated affordably It is therefore worth improving the target roof U-value to a similar level as that used in the current Notional Building in Scotland 0 09 W/m2K
Warm roofs
When looking to reach these low Uvalues, the thermal conductivity (lambda value) of the insulation is especially important, as this can significantly impact the depth of the roof construction. The lower the thermal conductivity of the insulation, the more effective it is at slowing heat loss, which can allow the Uvalue to be met with a slimmer construction than might be possible with materials with higher thermal conductivities.
Rigid phenolic insulation boards are well suited for applications where ambitious U-values are needed as they tend to have the lowest thermal conductivity of any commonly used insulation board (as low as 0 019 W/mK)
In addition to making use of thermally efficient insulation, some thought also needs to be given to the construction being used. Historically, many developers have tended to install insulation between the rafters, with a further layer of insulation or insulated plasterboard below However, even when designing the construction to allow phenolic insulation to fully fill the gap between 150 mm rafters, this can still require a substantial thickness of insulated plasterboard beneath just to reach a Uvalue of 0 11 W/m2K (as in the existing Notional Dwelling in England) This often
means ridge heights have to be raised to ensure there is sufficient headroom in the space below
As a result, it is often more straightforward to reverse this approach, fitting insulation above and between the rafters. In addition to helping to maintain internal headroom, this “warm roof” approach can also simplify detailing as a continuous layer of insulation can be maintained across the roof surface, limiting repeating thermal bridges through the rafters Minimising losses from these bridges is a key step to ensuring compliance both with ADL 2021, and the expected FHS, and should help to reduce any gap between the designed and actual energy performance of the property
When adopting this approach, it will typically be necessary to install a breathable membrane above the
insulation, followed by the cross battens for the roof tiles A Vapour Control Layer (VCL) applied to the internal face of the insulation behind the plasterboard lining can help provide both vapour control and good levels of airtightness
Room to grow
www.rdr.link/dbe025
Product substitutions made for the wrong reasons have become a justifiable point of focus for the construction industry, resulting in an examination of their impact on quality and safety. But when a product is substituted for good reasons, it can help to achieve the standard of installation and performance that we all want to see. Nowhere was that demonstrated better than on a residential development in Birmingham, explains Kieran Basi, Regional Sales Manager at Proctor Group.
SUPER-SUBS
It’s become something of a mantra for us at Proctor Group: “not all membranes are the same ” Two different products might look similar in terms of their performance data on paper, but that doesn’t mean they will perform the same once installed
There are a host of factors to take into consideration when comparing: third-party certification; accessories and extra processes; the testing behind the declared performance data.
And then there’s something that is arguably thought about much less, if at all What is a product like to install? To understand that means listening to the installers, which is what happened at Great Charles Street in Birmingham
Changing AVCL specification to get a better result
Moda Living’s 722-home build-to-rent scheme comprises a mix of one-, two- and three-bedroom apartments, including some penthouses.
The 16-storey block B and the 5/6storey block C of Great Charles Street both feature a concrete frame with brickwork finish The choice of external wall build-up meant the airtightness line was specified internally
The specialist contractors delivering the internal fit out package therefore
began installing the chosen air and vapour control layer (AVCL) membrane to the internal face of the walls.
However, it quickly became clear that a change needed to be requested The Project Manager started receiving feedback from the team on site that the membrane wasn’t the easiest to cut or handle A decision was therefore made to change to Proctor Group’s Procheck® A2 membrane
Procheck A2 is a vapour and airtight membrane Its composition gives the membrane a high degree of vapour controlling properties, as well as being airtight That allows it to be used as an
AVCL and helps contribute to the thermal efficiency of the building due to its reflective surface
It is also rated A2-s1,d0 when classified to BS EN 13501-1, meaning it is considered non-combustible with limited contribution to fire and can be used in relevant buildings and those over 11m/18m
Better handling and faster installation make a big difference on any project, but especially on sites like Great Charles Street With an internal airtightness line, installers have to work around a lot of penetrations, including ducts, pipes and brackets.
When any single penetration could be a source of failure when it comes to airtightness testing, a product that cuts and handles well reduces the potential risks of failure.
Combining product performance with quality control
Even when installers find a product is easier to handle and use, long-term building performance still depends on a high standard of quality control
Thorough checking of the on-site team’s work also played a significant role at Great Charles Street That meant encouraging as many people as possible to view the installation and provide feedback before it was covered up.
Block managers from the main contractor checked all the work The specialist contractor also requested a site visit from Proctor Group’s technical team, who produced a report on the quality of the installation
The change in product and the approach to quality control has paid dividends Finished apartments that have been airtightness tested have averaged results below 2.0 air changes per hour (ACH) at 50 Pascals pressure
Compare that to the minimum standard of 5 0 ACH required by the Building Regulations, and it gives an indication of the performance and thermal comfort that eventual occupants can expect to enjoy at Great Charles Street – thanks in part to a well-made product substitution
WAN T TO KNOW MORE?
Find out more about Procheck A2 at www.rdr.link/dbe026
SINGLE SOURCE
Dan Redfern, Head of Marketing Communication at Marley, explains how deploying a single-source strategy for full roof systems, allied to an integrated renewable technology package, means housebuilders can access an effective and guaranteed roofing solution, together with the benefits of self-generated energy that today’s renewable technologies can offer.
Housebuilders and developers are operating in a changing landscape This is driven by the Government’s net zero commitment, the implications of the impending Future Homes Standard and increasing consumer demand for renewable energy sources that deliver more sustainable and cheaper power into the home
The importance of a full roof system
Marley’s full roof system delivers clear benefits, which underpin a strong house buyer proposition Tried and tested to work together seamlessly, its array of components include underlay, roofing battens, an extensive range of attractive and highperforming clay or concrete tiles, fixings, fittings and roof ventilation accessories. And, importantly, the full system is backed by the reassurance of a 15-year performance warranty
In a changing regulatory world, a full roof system from a single manufacturer also ensures every roof component is fully compatible and compliant with current legislation when installed in line with British Standard regulations A single-source system also reduces the risk of inferior product substitution that can compromise roof performance over the long-term
Alongside the installation and performance confidence offered by a full roof system, the addition of a complete renewable technology package can deliver a compelling, holistic offering This is especially attractive for housebuilders and developers aiming to design, construct and sell lower carbon, energy efficient homes that are futureproofed and attract clients.
Marley’s robust product portfolio extends from the ‘roof to the road’, with the inclusion of a fully integrated solar roof system: an EV charger, batteries and inverter solutions These elements come together to make the most of solar generated power as a clean and sustainable energy source. The specification of such roof-related technologies in a new development can be a tangible market differentiator and help attract would-be home buyers looking to a more sustainable future
WAN T TO KNOW MORE?
For more information, visit Marley’s website at www rdr link/dbe027
Mark Cooper, UK and Ireland sales director at insulation specialist Actis, looks at how the UK can meet the challenge of steep housing targets with an underpowered construction workforce
OFFSITE RULE
The government is going full steam ahead with its housing development plans. With an overall target of an additional 1 5 million homes over the course of the current parliament, including entire new towns, it has also pledged £39 billion to help build more affordable and social housing
But, in addition to negotiating factors such as planning reform, land availability, infrastructure issues and local sentiment, two further elements are crucial to the success of the campaign. They are putting much more focus on creating faster-tobuild offsite homes and substantially increasing the construction workforce.
Check-a-trade’s Annual UK Trade Skills Index report revealed that the UK needs another 1 3 million skilled workers and 350,000 apprentices in order to meet government housing and net zero targets, along with home improvements, in the coming decade.
This shortfall is exacerbated by an ageing workforce, with 35 per cent of current workers aged over 50 and many planning to retire within the next decade
A three-point plan to help address the shortfall created by the tradesmenmatching site says companies should be encouraged to take on apprentices, training must be improved and schools should interest youngsters in construction careers We’ve added a fourth to the mix –increasing build speed
In our own small way we’re doing what we can to encourage young people to consider careers in the industry We have our own outreach programme which aims to instil a passion for a career in construction among young people, with our team visiting schools and colleges to offer training days and insight into career options
Equally importantly, we need to encourage developers to incorporate more offsite construction into their housing mix
Offsite construction is an excellent way to build more homes in less time, as they can be built up to 30% more quickly than their traditional counterparts
Many elements, including insulation, take place in the factory. Our insulation systems take between 25 and 50% less time to install than traditional alternatives, which all helps to speed up the process. The onsite build element typically takes between seven and 12 days, depending on the size of house.
While they are quicker to build, the quality of offsite homes is far better controlled Timber frame homes can be thermally superb, cutting carbon emissions and saving money and resources
Many areas of construction require highly skilled professionals. But there are some which require less academic expertise and practical training, which could be carried out by apprentices while they enhance their skills further This would free up time for some of the higher skilled workers to concentrate on the trickier elements of construction
Some elements are highly mechanised, something which ensures consistent good quality, and could be carried out by tradespeople perhaps at an earlier stage of their career With proper focus and a strategic approach, this could help us create more homes which are also thermally efficient and of good quality
Lisa Stephens, Product Manager at ROCKWOOL® UK, explores why futureready homes demand insulation solutions that deliver more than just thermal metrics.
MIND THE GAP
Designing insulation into the building envelope – walls, floors and roof – is an effective way to help improve the overall energy performance of a new home, but this is dependent on the quality of installation While the insulation specification might indicate the expected energy performance, the ‘as-built’ result may differ – creating what’s often referred to as the performance gap
Instances of poor detailing – such as gaps forming between insulation, lack of insulation and continuity at junctions, poor installation in lofts, debris and mortar snots in cavity walls, and incorrect positioning of windows and doors – all have an impact
While a small gap might seem insignificant, evidence suggests that even air gaps as small as 6mm can significantly increase heat transfer and reduce overall thermal performance.
Changes to Approved Document L 2021 (England) aimed to close this ‘performance gap’ by requiring developers to provide photographic evidence at key stages of construction This evidence should show that insulation has been installed continuously and without gaps, before these elements are concealed
Ensuring an accurate and quality fit plays an important role in achieving this continuous insulation layer, but material choice also makes a difference when closing the performance gap.
Selecting a product
Achieving a precise fit and as-designed performance depends on the type of insulation used and selecting a product solely on its thermal conductivity overlooks this critical consideration
Opting for pliable insulation can help
achieve a tight, continuous fit efficiency, as it can be friction-fitted without extensive and precise cutting. More flexible insulation also allows for easier installation at the abutments between insulation boards
To investigate the performance of stone wool insulation, ROCKWOOL conducted a study with the University of Salford Thermal Measurement Laboratory. The aim was to understand what happens physically when two pieces of ROCKWOOL insulation join.
Stone wool also maintains its shape and density over time – an important factor, since some insulation types can lose thermal performance due to loss of dimensional stability.
In tests on materials from real-life installations, it was found that stone wool can retain its insulating properties for more than 65 years without a drop in thermal performance
A practical solution
With build programmes under pressure, there is a need for insulation systems that are straightforward to install and deliver consistent results
WAN T TO KNOW MORE?
For more information on closing the performance gap, read the ROCKWOOL Technical Bulletin at www.rdr.link/dbe029
BREATH OF FRESH AIR
Bradley Hirst, Technical Services Manager at Knauf Insulation, explores why insulation impacts indoor air quality more than you think.
With the Future Homes
Standard on the horizon and the government’s stated target of building 1.5 million homes in the next five years, housebuilders are under pressure to deliver more for less Insulation will play a key role in the drive to lower carbon emissions and energy costs But the right approach to insulation also has other, sometimes overlooked, benefits – including helping to improve indoor air quality (IAQ)
Housebuilders that understand this can differentiate themselves not just on lower running costs and improved comfort, but on occupant health
Occupational hazards
To appreciate insulation’s role in IAQ, it's important to first understand some common health concerns Sick Building Syndrome (SBS) refers to a range of nonspecific symptoms, such as headaches or fatigue, that appear to be linked to time spent in a particular building While poor air quality can be a contributing factor, SBS can also stem from other environmental issues like dust, lighting, or excessive noise 1
In contrast, Building-Related Illness (BRI) refers to health conditions caused by identifiable factors such as exposure to volatile organic compounds (VOCs) or mould spores 2 While the causes of SBS symptoms may be ambiguous, BRI is
directly linked to a building’s environment – and housebuilders can take targeted actions to reduce the risks
There are three main factors that influence IAQ: the external environment, occupant behaviour, and the building’s construction. Outdoor air pollution can infiltrate buildings, while indoor activities like cooking, smoking, or owning pets can release pollutants For housebuilders, the third factor is the most important, and that is the design and construction of the building itself Building performance, and the materials used to deliver it, are crucial for managing air quality, reducing the risk of SBS and tackling the causes of BRI
Ventilation, insulation and mould
One of the most visible and harmful indicators of poor IAQ is black mould, which thrives in damp conditions and can cause respiratory issues or aggravate allergies
High indoor humidity and poor ventilation will cause water vapour to condense on cold surfaces such as poorly insulated walls
This provides all the required conditions for mould to flourish – which can feed off any organic material including wood, dust particles, wallpaper, cardboard, cellulose or even gypsum board
This is where insulation becomes vital
Well-insulated walls retain heat during colder months, reducing surface condensation and the likelihood of mould However, insulation must be installed
correctly to be effective. Any air gaps or discontinuities in the thermal envelope can lead to cold spots where condensation forms more easily. A continuous, properly installed insulation layer ensures surface temperatures remain consistent and discourages moisture build-up.
Ventilation works in conjunction with insulation to reduce mould growth. Without sufficient ventilation, even the best insulation can’t prevent poor IAQ. Effective systems, whether passive (like trickle vents) or mechanical (such as extractor fans), ventilate moisture-laden air to prevent the conditions that allow mould to flourish.
Construction products and VOCs
Building performance isn’t the only way housebuilders can improve IAQ. The materials used during construction can have an impact on indoor levels of VOCs – gases emitted from common construction products that can cause a variety of acute health symptoms for building occupants.3 By using products with low VOCs, housebuilders can help to mitigate some of the potential risks of harmful chemicals.
When choosing low VOC insulation, we recommend housebuilders look for Eurofins Indoor Air Comfort Certification.
Eurofins Scientific has developed a European-wide standard for testing the VOCs emitted by consumer products, including building products. There are two certifications for indoor air comfort, ‘standard’ and ‘gold’. The latter is awarded to those products that go beyond legislated standards and contain no formaldehyde or phenols.
For example, Knauf Insulation’s glass mineral wool range uses ECOSE®, their unique plant-based binder that is lowVOC and contains no added formaldehyde. As a result, these products have been awarded Eurofins Gold Certification for indoor air quality.
Healthier buildings
By combining proper ventilation, low-VOC materials, and a continuous thermal envelope, housebuilders can reduce risks like condensation, black mould, and exposure to harmful chemicals. With growing demand for healthier, more sustainable homes, those who prioritise indoor air quality will be well-positioned to meet regulatory standards and exceed customer expectations.
Sources:
1 NHS website: Sick Building Syndrome
2 Design Buildings website
3 Environmental Protection Agency website
HERE COMES THE SUN
PHPD talks to Catnic about its latest launch, Solarseam, a bonded integrated solar solution that’s easy on the eye.
Just last month the Government announced that the long-awaited Future Homes Standard 2025 would finally be launching this Autumn, with mandatory new build solar panel installations playing a part While this announcement has come as a welcome confirmation to many, there are those out there who still aren’t entirely convinced by Energy Secretary Ed Miliband’s “rooftop revolution” and what it will mean for rooftop aesthetics across the country Indeed, the bulky, unnatural look of proud-mounted solar panels has consistently remained one of the lessdesirable aspects of harvesting our local star Thankfully, and with perfect timing, Catnic has come up with a nifty solution that’ll put any visual worries to bed
The solution
Enter the SolarSeam; an innovative photovoltaic (PV) solution for standing seam roofs that has been engineered to deliver exceptional performance without compromising on aesthetics The solution consists of a flexible solar laminate bonded to the popular Catnic Urban standing seam roofing panel, delivering efficient renewable energy without the traditionally highly visible frames Because of this, and as an
added bonus, the panels can be installed on roof pitches down to five degrees for true design flexibility The solution is supplied as a complete kit of parts too, including the panels, flashings and fixings, making it simple to order and straightforward to install With increasing pressure to deliver more and more new homes and at a faster rate (if we’re ever to reach that 1 5 million target), this single-source, hassle-free quality makes for a welcome added bonus.
The technology
Catnic SolarSeam uses Copper Indium Gallium Selenide (CIGS) solar technology
The MCS Certified low-profile CIGS cells are made up of multiple diodes, meaning they have excellent ambient light performance, and unlike traditional monocrystalline panels, have high shade tolerance. This means that more energy is captured, even on cloudy days, and homeowners are not restricted to installation on south facing roofs. In fact, with monocrystalline panels shading reduces energy production by as much as 80%, while for CIGS panels it is as little as 10% CIGS cells are also lighter, more flexible and more resistant to damage, cracking and physical impacts
It also provides further sustainability benefits as the SolarSeam’s CIGS cells are
manufactured in the UK and require significantly less energy to produce compared with monocrystalline products for a lower carbon footprint Additionally, the Catnic Urban panel that the cells are bonded to, is also made in the UK and has BES 6001 Responsible Sourcing certification and a BRE A+ rating, demonstrating it has the lowest overall environmental impact All this makes Catnic SolarSeam ideal for environmentally conscious customers. With fire performance an essential consideration, the solar panel, when bonded to a Catnic Urban panel, has been tested in accordance with CEN/TS 1187-4 and classified as BROOF(t4) for external fire performance, the highest rating possible, with minimal flame spread and no fire penetration for at least 60 minutes
For the homeowner, SolarSeam is supplied with the peace of mind of multiple guarantees There is a 25-year Confidex® Home Guarantee on the Catnic Urban roof substrate as well as a 10-year solar product guarantee The performance of the solar is
also covered by a 25-year guarantee. All of which are transferrable to the new owner
Amanda Hinks-Edwards, Business Manager at Catnic commented: “With the target for a 68 percent reduction in greenhouse gas emissions from 1990 levels by 2030, renewable energy, and solar in particular, has never been more important Recent indications from the Government suggest that solar panels could be mandatory on all new homes from 2027 and with a target to build 1.5 million new homes within this parliamentary term, the expansion of residential solar could be considerable
“Catnic SolarSeam provides an ideal solution for new and refurbishment projects that delivers excellent solar performance and allows design flexibility and uncompromised aesthetics. It also represents an opportunity for roofing professionals with skills in the installation of standing seam roofing to expand their offering to customers ”
THE GAME’S AFOOT!
Ground investigation is a crucial part of any development. It will establish the site setting, identify potential hazards, support pre-planning appraisals and inform detailed site design and any remediation. So what should housebuilders and developers be mindful of when it comes to groundworks? When should they be undertaken and what are the most effective methods? Chris Wall, Geoenvironmental Associate at specialist technical consultancy, MEC Consulting Group shares his insight…
Good ground investigation begins with a desk-based assessment
This will research site history, environmental data, geology, and informs a complete picture of the site before any intrusive work is undertaken It is advisable to commission desk studies pre-planning as this will provide the scope for further ground investigation works such as sources of contamination that need testing
Next, physical ground investigation should be conducted. For residential development, common techniques are trial pitting, dynamic sampling, cable percussion boreholes and rotary boreholes, however, the exact scope should be based on the findings of the desk study
Again, I advise undertaking on-site investigation as soon as possible. Not only is it needed to discharge planning conditions, but it will also help pick up anomalies or concerns. So, for example, if poor ground is found, there is an opportunity to refine and zone this, saving valuable time at foundation design stage
Common outcomes
The most common outcomes from a physical ground investigation are where there are aspects of the site that need
remediation These will either be contamination or geotechnical challenges
Contamination can be derived from a point source, such as a fuel tank, or could be more widespread and associated with previous industrial uses This is particularly prevalent on brownfield sites.
Geotechnical challenges often include weak or reworked ground, either naturally occurring or man-made, with the latter known as ‘Made Ground’
Uncovering these contamination and geotechnical challenges as soon as possible allows developers to plan early and potentially mitigate these issues as part of the design process
Remediation
The UK approach to assessing contamination is based on the ‘SourcePathway-Receptor Concept’ To successfully mitigate a contamination risk, one of these links must be broken Source options can include excavation and disposal of soil at landfill, although
Ground Investigation methodologies being undertaken by MEC Consulting Group - drilling rig
Ground Investigation methodologies being undertaken by MEC Consulting Group - trial pitting
this can represent a high-cost solution if the soil is classed as hazardous waste
The Source can also be treated, either insitu or ex-situ For example, if the site has an area of hydrocarbon impacted soil, this needs to be broken down Naturally, this could take 100+ years so treatment encourages and accelerates the natural breakdown process The earlier Source treatment is started the better, as this can potentially allow previously contaminated soils to be reused on site
Breaking the Pathway primarily occurs by preventing contact with contaminated soils On residential development, this remediation is typically dealt with by including clean capping in garden and soft landscaping areas Clean capping involves importing and installing clean soil, usually with a membrane beneath to restrict future residents from digging down and reaching the contamination
Where weak soil or deep Made Ground has been encountered, traditional foundations become less feasible and further geotechnical consideration is required Alternative solutions can include piling or ground improvement such as vibro or dynamic compaction to increase the soil strength.
Current legislation
The majority of ground investigation methods are tried and tested; however, contamination guidance is regularly
reassessed with updated threshold values continually reviewed by industry experts
Last year, NHBC also updated its earthworks guidance, requiring all residential developments to provide a verification report on completion of earthworks filing and testing This is important for housebuilders and developers to bear in mind, as if site levels have had to be changed for drainage or visual reasons, then the NHBC will want to see evidence that the potential risks associated with earthworks, such as settlement or subsidence, have been fully addressed If not managed or reported correctly, this could present cost and time delays to resolve
One final word of advice relates to brownfield development sites Here, it is strongly advised to pair ground investigation with underground utility mapping In dense, urban areas, many utilities maps don’t show the necessary level of detail
Commissioning a utility survey, which can be done with ground penetrating radar or electro magnetic detection, gives us a clearer picture before we start any site digging
Ultimately good ground investigation mitigates risks, allows for collaboration with other project disciplines, enables informed decision-making and keeps us all safe
Ground Investigation methodologies being undertaken by MEC Consulting Group – soakage testing
Excavation of hydrocarbon impacted soils
WALKING ON WATER
Sustainable drainage systems (SuDS) are rapidly shifting from an optional feature to a fundamental part of responsible groundworks.
PHPD talks to Bioscapes about the rising SuDS responsibility and how forwardthinking housebuilders can best benefit from it.
Although Schedule 3 of the Flood and Water Management Act 2010 has yet to be enforced in England, the need to tackle flood risk is pressing. The Environment Agency warns that by 2050, around eight million properties in Englandone in four - could be at risk of flooding, with climate change accelerating the threat.
Even without legislative mandates, developers face a clear imperative to buildin resilience from the ground up. And the house-buying public is taking note - more environmentally aware than ever, today’s buyers increasingly expect flood-conscious, biodiversity-supporting developments from forward-thinking builders.
SuDS don’t just manage water - they deliver broader environmental and community value. Built around four core principles - water attenuation, water quality, biodiversity and amenity - SuDS offer measurable benefits when integrated from the outset.
From rain gardens to permeable paving, early integration supports compliance, enhances liveability, and boosts site value. Among the most practical options is the BioScapes® SuDS planter: a cost-effective, ground-level, off-the-shelf solution combining rainwater management with biodiversity enhancement. Proven to deliver a 7-fold biodiversity uplift, it is already being widely adopted by local authorities and water companies to meet dual objectives with minimal disruption.
The UK is one of the most naturedepleted countries in the world, and a recent Royal Town Planning Institute investigation reveals many developments fall short of their biodiversity commitments, despite the growing legislative push for Biodiversity Net Gain (BNG).
Without real interventions - such as wildflower-rich swales, wetland zones, and pollinator planting - projects risk reputational and planning setbacks. SuDS offer natural alignment with BNG by combining drainage with habitat creation.
To support this, BioScapes Limited provides ecology consultancy services -
helping developers assess existing site biodiversity and outline achievable, costeffective strategies for net gain. Engaging this expertise early can strengthen planning applications and reduce the risk of redesign or delays.
According to Terry Smithson, Head of Nature-based Solutions at BioScapes, embracing SuDS now offers a distinct edge:
“While many in the industry wait for Schedule 3 to be enacted, forward-thinking developers are already weaving SuDS into their groundworks. Doing so not only demonstrates environmental leadership but also pre-empts future compliance, unlocks permissions more easily and builds floodresilient places that stand the test of time.”
These systems also serve as standout sales features - green spaces and visible sustainability credentials resonate strongly with modern buyers.
There’s a common misconception that installing nature-based solutions is difficult to implement or costly when actually, they can provide cost savings. Defra research showed that in new build projects SuDS may be 30% cheaper than standard drainage.
In a changing climate, the real question is not if SuDS should be included—but how soon. Even without legal enforcement, the case is clear: integrated, sustainable drainage is no longer optional.
By incorporating SuDS from the outsetcomplemented by ecological design and expert planning support - developers can mitigate flood risks, deliver biodiversity gains and meet the expectations of both regulators and residents. In doing so, they’re not just building homes - they’re building responsibly for the future.
Sources:
WAN T TO KNOW MORE?
For more information on Bioscapes visit
¹ Environment Agency flood risk projections, 2025 ² RTPI: Are developers in England delivering ecological enhancements required by planning permissions? www.rdr.link/dbe033
A TRUSTY WORKHORSE
PHPD hears from Meynell Plant Hire on how its JCB backhoe fleet has been supporting Jelson Holdings housebuilding activity since 1956.
On construction sites across the East Midlands, one machine has become a symbol of versatility, reliability and sheer staying power – the JCB backhoe loader, which has been a tireless workhorse for six decades for leading rental firm Meynell Plant Hire.
Meynell’s latest addition, a new 4CX Pro DualDrive model, brings the story right up to date. Featuring JCB’s latest innovations in productivity, comfort and control, it’s a modern evolution of a machine, the JCB 3C, that first arrived on the company’s sites in 1965 and has been ever present since
Tradition meets technology
Meynell Plant Hire, part of Leicestershirebased Jelson Holdings, has been supporting the group’s housebuilding and development activities since 1956 Today, its JCB backhoe fleet stands at 16-strong, deployed daily across Jelson Homes’ traditionally-built new developments and industrial projects
Through constant evolution, JCB has become synonymous with the concept of a wheeled machine, with a bucket at one end and a shovel at the other Over 73 years, the backhoe loader has been the very cornerstone of construction and plant hire businesses across the world
Depot Manager at Meynell Plant Hire, Mark Stone said: “We’ve always stuck with JCB They’ve supported us well, and the machines do exactly what we need Backhoes especially – they’re the Swiss army knife on site We’d be lost without them ”
More for less
Meynell’s backhoe loaders are used for a huge variety of tasks ranging from site clearance, trenching and foundation excavation to drainage, roading, lifting and materials handling Each machine can replace several others – reducing site congestion, fuel use and emissions in the process
Mark Stone said: “They dig, load, lift and move They’re involved in nearly every job from start to finish And we’re not just talking about minor tasks, they do the real heavy lifting too ”
Raising the bar
Meynell’s latest acquisition, the 4CX Pro, marks a continued evolution of the backhoe loader concept which JCB pioneered in 1953. It is fitted with JCB’s innovative DualDrive system, which allows the operator to reposition it while still seated at the rear-facing excavator controls – ideal for trenching, grading and working in tight spaces
Mark Stone said: “On confined sites, JCB’s DualDrive feature is a gamechanger You can just reverse or reposition without leaving the seat It’s safer, quicker and far more efficient.”
Additional upgrades on the latest JCB backhoe loader models include:
● A new single loader lever for shovel and transmission control
● Return-to-grade function for faster, accurate levelling
● Mounting points for 2D laser level systems
● Upgraded fork carriage for improved load stability
● Autoshift transmission with TorqueLock, improving travel speed and reducing fuel use
In independent trials, the 4CX delivered 63% faster cycle times and used 73% less fuel than a 13-tonne tracked excavator when moving 50 tonnes of stone
Compared to an eight-tonne excavator and site dumper working together, it was 25% faster and used 50% less fuel
Built for building
Joiner and shopfitter James Jelley first set up in business in Leicester in 1889, laying the foundations for Jelson Holdings. Still a family-run business, the company manufactures its own windows, joinery and internal block walls, alongside the housebuilding developments with many trades employed directly through the Jelson Holdings group.
That same in-house ethos applies to its plant operations Meynell Plant Hire not only specifies equipment carefully for every job but also involves operators directly in the procurement process
Mark Stone said: “Our operators are key to what we buy. They know what works in the real world Comfort, capability, ease of use – the 4CX Pro ticks all the boxes.”
Beyond the backhoe, Meynell’s JCB fleet includes tracked excavators, Loadalls, compact excavators, compaction rollers and a pair of 220X crawler excavators equipped with mulching head attachments Each is supplied by dealer Watling JCB, in a proven partnership that dates back to 1976
Fuel of the future
While clean diesel machines still dominate site operations, Meynell has shown a keen interest in what comes next – and that includes hydrogen The company recently took part in a customer evaluation of JCB’s hydrogen-powered backhoe loader, trialling the machine alongside its diesel counterparts
Used for typical on-site tasks such as loading brick packs on to scaffolding, transporting materials and digging footings, the hydrogen backhoe performed seamlessly Mark Stone said: “There was no drop in power, and the operators couldn’t tell it apart from the diesel model. We were genuinely impressed ”
The backhoe is powered by a hydrogen internal combustion engine developed in-house by JCB It delivers identical power, torque and performance to its diesel equivalent, but with zero carbon emissions at the tailpipe – just water vapour and steam
This development forms part of JCB’s £100 million investment into hydrogen power – a programme personally led by Chairman, Anthony Bamford Over 50,000 hours of testing have been logged across various hydrogenpowered machines, including backhoe loaders, Loadalls and generators.
Mark Stone said: “We’re definitely interested when they become available to buy If you can get zero emissions without compromising on performance or uptime, why wouldn’t you?”
The best of the best
Grass Concrete explains the key to sustainable practices when specifying grass paving
systems.
GROWING CONCERNS –SMART PERMEABILITY
Today’s wide choice of grass paving systems means that specifiers now have a massive choice of products and specification As a supplier of grass paving systems for more than fifty years, Grass Concrete sees a strict fit for purpose policy as the key to achieving sustainability in any construction project
Take for example a daily used access road or housing development car park in daily use; “will the grass cover and then the structure stand up to that sort of regime?” If the application is to slopes, “will it function as an armouring layer and will it offer grip?” These are the sort of challenging questions that that should be asked to ensure a correct specification.
The Grass Concrete policy is to guide clients to the most appropriate system –in-situ-concrete, pre-cast concrete or plastic systems This strict fit for purpose policy is the key to achieving sustainability in any construction project, with careful consideration of grass paving types, particularly when likely to be subjected to frequent traffic and weights of vehicles
With a long-established track record of grass paving installations, Grass Concrete is uniquely placed to work closely with housebuilders and architects alike to recommend appropriate systems
Experienced insight
At Grass Concrete, our 50 years plus of grass paving experience and installations has given us considerable insight into sustainable permeable paving and, more recently, with the attention around Sustainable Urban Drainage Systems (SuDS). Recent high rainfall and flash flooding puts extreme pressure on the drainage and sewer network which is often unable to cope with this peak demand SuDs schemes are designed to mitigate these scenarios Grass Concrete’s view is that Smart Permeability is what is required Incorporating SUDS using Grass Concrete’s permeable paving helps mitigate
the implications of surface water run-off and its implications for the functioning of the local storm water network
It’s not simply about getting water from A to B, it is about what you do with it along the way Smart Permeability, using source control to manage the rate of permeability, both mitigates downstream impact and provides essential root nourishment for grass coverage
Compare the systems
Sustainable grass cover is best achieved by a system that promotes permeability
The depth and shape of the soil pockets can have a critical part to play Both Grasscrete and Grassblock offer substantial capacity for soils and root systems to promote maximum grass coverage
A grass reinforced system can permeate at up to 90% the rate of natural grass and a safe lag time can be achieved Storing water within the system with low risk of ponding until the ground can naturally re-charge is a significant benefit Lag time is beneficial in the prevention of flooding and can be extended by introducing an underlying drainage blanket across the full extent of the paved area The drainage blanket can be used to either attenuate permeation to the water table or be a vehicle for rainwater harvesting
Fit for purpose policy
Grass Concrete offers both cast-on site Grasscrete and precast Grassblock systems and follows a strict fit-for-purpose policy as the key to achieving sustainability in any construction project
A GRADE ABOVE
PHPD finds out how one civil engineering & groundworks company is benefitting from GPS controlled grading attachments on its latest Bobcat acquisitions.
Bedford-based ECL Civil Engineering has purchased two new Bobcat T86 compact track loaders with matching GPS controlled grading attachments from Versatile Equipment, the local Authorised Dealer for Bobcat throughout south east England. Over the last three decades, ECL has grown from being a groundworks services company to an ambitious and continually growing national civil engineering provider, with an annual turnover of more than £100 million
Steve Wright, Plant Manager at ECL, said: “Our Managing Director, Sean Hoare, is a strong believer in the training and development of our staff, ensuring that we have the tools such as the new T86 that we need to complete our work to the highest expectations and standards that ECL strive for. Guided by Sean, we take pride in being the first in the UK to integrate this cuttingedge technology into a fleet like ours This innovation not only boosts productivity but also enhances work quality, ushering in a new era of efficiency and excellence for our operations and clients alike ”
Delivering a higher engine and hydraulic output, the Bobcat T86 is the most powerful compact track loader the company has ever built. The T86 uses a well-proven Stage V compliant 3 4 l Bobcat engine – producing 78 kW (105 HP) at 2600 RPM, providing more power than many other machines of its size Just like all of Bobcat’s R-Series loaders, the engine is mounted in-line with direct drive, which improves the cooling capacity of the engine and hydraulic components
Sean and Steve worked with Phil Stoneham, Area Sales Manager at Versatile Equipment on the purchase of the T86 compact track loaders Phil added: “With the addition of the GPS Control Grading kit on the T86, we’re elevating grading performance by being able to achieve a remarkable precision of 3 mm or one-tenth of an inch The Clear-View Cab on the T86 loaders maximises visibility, ensuring the
best possible view of the tracks and the corners of the machines and a 360-degree safety camera system provides a full view of the surroundings
Steve Wright added: “The Bobcat T86 is also one of only a few on the market to offer three different auxiliary hydraulic flow options, ensuring powerful hydraulic performance for a range of advanced attachments tailored to specific tasks.
“There is a standard flow configuration providing 87 l/min for applications such as load and carry, or where low hydraulic flow attachments are used The T86 units also offer two additional hydraulic performance functions using the new Electronic Displacement Control (EDC) Pump on the T86: a High Flow function giving 138 l/min and a new industry unique Super Flow function taking auxiliary flow to 159 l/min.”
The Five Coupler Block (standard with the Super Flow function) provides a flexible approach to running different attachments From one common source, the operator can attach both standard or high flow approved attachments to the smaller sized ½ inch quick couplers Then when using Super Flow, the use of the ¾ inch couplers allows maximum performance and productivity from the approved advanced attachments
Both High Flow and Super Flow options come integrated with Bobcat’s unique ‘Plug & Play’ attachment control device (ACD) The T86 machines also have Power Bob-Tach Attachment systems as standard The Power BobTach is an added comfort and productivity feature that allows some attachments to be connected and removed without the operator leaving the seat, just using the switches conveniently located in the cab – it is optional on Standard Flow machines
WAN T TO KNOW MORE?
For more information about Bobcat products, attachments and services, visit www rdr link/dbe037
PHPD talks to Takeuchi’s Marketing Manager, Holly Cooke about Takeuchi excavators and how they can help with groundworks.
BREAKING GROUND
PHPD: What’s the best way to start groundworks?
Holly Cooke (HC): For initial groundworks you can always make a big start with a 15tonne Takeuchi TB2150 with offset boom or TB2150R with fixed boom These are both powerful machines for deep excavating or reduced level digging in the early stages of a project where machine power is critical The breakout force and power make these models ideal for tough ground or heavy soil strata like clay
PHPD: What machines can be used for larger sites?
HC: For larger housebuilding sites – of 50-plus plots, for example – a wheeled excavator on site provides real versatility The new Takeuchi TB370W provides a dynamic site ready option It is a multiutility vehicle with different attachments for lifting in and around site At 7 5 tonne, it is both powerful and compact
The 2-piece boom makes travelling around site easier and more compact and offers added in-field lift capacity
With three different working modes –Std, Eco and Eco Plus – operators get the best efficiency Simply switch to cruise control for consistent travel speed while operating attachments and the auto digging brake for safety and efficiency during stop-start tasks
PHPD: What machine is best where space is an issue?
HC: Where access might be limited, short tail options provide a viable alternative in getting access where others can’t
The unique FR design on a TB280FR, or TB257FR, provides for parallel trenching right next to walls and buildings
Its side-to-side STS offset boom can be positioned anywhere across the front of the machine without any reduction in dig depth or ground reach Operators no longer need to reposition the tracks for the optimum excavating angles; they simply let the STS offset boom do all the work for them.
At the smaller end, the classic Takeuchi mini excavator is the 1 6 tonne TB216. It comfortably trailer-tows to get to site and provides proven capability Very popular with housebuilders, it remains the most popular weight class for Takeuchi and is seen in just about every hire shop
PHPD: What is Takeuchi best known for?
HC: When you ask operators it has to be smoothness and precision control – along with reliability.
For backup, the Takeuchi dealer network provides local support when you need it. There are more than 20 dealers nationwide with multiple depots and engineers to support customers
Excavating and groundworks remain a critical part on any housebuilding project and investing or hiring in power performance excavators is essential to get the job done well.
Good groundwork is down to skilled operators combined with high quality machines – this combination goes handin-hand
WAN T TO KNOW MORE?
For more information on Takeuchi visit www.rdr.link/dbe038
WALL PANEL
In 2024, the Donaldson Timber Systems (DTS) open panel Alpha system became
environmental product declaration (EPD)
DTS now also holds EPDs for its preinsulated wall system, Delta; and the
award-winning closed panel system,
Sigma II solid stud and Sigma II I stud
For more information go to www.rdr.link/dbe039
PRE-PLUMBED ASHP CYLINDER
With the increasing demand for air source heat pumps (ASHPs), Baxi is helping developers complete projects faster with the launch of its ASHP Pre-plumbed Cylinder With much of the pipework, fittings and wiring already in place installation times are reduced The new cylinder is available in capacities of 170 to 300 litres whilst a compact footprint means it can be accommodated in an airing cupboard or smaller space
For more information go to www.rdr.link/dbe040
SOIL TREATMENT
A sustainable alternative to
excavation and
www rdr link/DBE100
JCB
Kingspan Insulation
www rdr link/DBE102
Marley Ltd
www.rdr.link/DBE103
www rdr link/DBE104
link/DBE106
Takeuchi MFG (UK) Ltd
www rdr link/DBE107
T-T Pumps Ltd
www rdr link/DBE108
Wavin
www rdr link/DBE109
Wavin
www rdr link/DBE110
FLOORING PANEL
STRUCTURAL TIMBER BUILDINGS
To support best practice in the growing use of timber within buildings, the Structural Timber Association (STA) has released ‘Structural Timber: Design and Construction Guidance’ It will provide valuable insights into structural timber construction methods, such as open and closed panel timber frames, structural insulated panels (SIPs), cross-laminated timber (CLT), and volumetric modular systems.
For more information go to www.rdr.link/dbe042
Jigsaw Construction Essex is making extensive use of panel products from the West Fraser range – including CaberDek Founder David Bellinger explains that installing the product across first-floor levels “offers good protection from all the mess which the plasterers and decorators tend to leave plus CaberDek locks in well together, so we have no issues with installing the boards ”
For more information go to www.rdr.link/dbe043
WOOD BURNING STOVES
The Government has confirmed that modern wood burning stoves will be permitted as a secondary heating source in new homes built under the Future Homes Standard According to Andy Dimond, Sales & Marketing Manager at SFL Flues & Chimneys “it recognises the role modern wood burning stoves can play in supporting energy resilience and net zero goals, especially when integrated with other renewable systems,”
For more information go to www.rdr.link/dbe044
CLAY TILES
The Ashurst colourway is the latest addition to Marley’s Acme Single Camber clay plain tile range Founded on the warmth and the character of clay, it helps to deliver a beautiful, rustic aesthetic for both traditional and contemporary low pitch roof designs and is complemented by a full range of Ashurst fittings, offering a complete solution for specifiers Recently, the Acme Single Camber profile has been extended to include a Heritage clay tile range: perfect for those seeking durability and traditional aesthetic appeal
For more information go to www.rdr.link/dbe046
DECENTRALISED MECHANICAL EXTRACT VENTILATION
The iSense-Plus from Nuaire, part of the Genuit group, is a decentralised mechanical extract ventilation (dMEV) fan designed to provide Building Regulations compliant continuous background extract ventilation for new build residential properties It acts as a cost effective alternative to whole house mechanical extract ventilation (MEV) systems
For more information go to www.rdr.link/dbe045
COMPOSITE DECKING
4K high-definition wood imaging is a feature of Talasey’s latest range of composite decking: Pioneer Through this imaging, every grain and texture is captured with ultra-precision, blending an incredibly realistic hardwood timber aesthetic with industryleading board resilience and durability The decking is engineered with woven fibreglass strands and bamboo to create a resistant, robust, reinforced, mixed core that resists softening, flexing, warping and impact
