2016
TopRoof YOUR SOUTH AFRICAN ROOFING MAGAZINE
ITC: THE RIGHT TIMBER FOR THE RIGHT ROOF. JUNE/ JULY 2016
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Contents ITC SA
4
LCP ROOFING
6
ASHGRIDTM
17
HEALTH & SAFETY GUIDELINES
20
Benefits of pre-fabricated roof trusses
hosts Safintra Newlok information session
has Pick ‘n Pay Covered
when over-roofing an existing asbestos cement roof
Publisher: ZA MEDIA Ltd Graphic Designer : Jean Bernard Sibomana Annabelle Joubert Cover Picture : ITC SA Tel: +27(0) 76 510 5802 E-mail: gail@za-media.co Address: 60 Hennop Street, Langeberg Heights, Durbanville, 7570, South Africa
GRS Klip-Tite
There is no approved or equivalent No other product has this performance! KLIP-TITE - ONLY FROM GRS Developed through continuous in-house testing of Klip-Lok 700, it was evident that failures occurred due to deflection of the pan during high wind loads causing the sheets to disengage. The following improvements were thus developed: • Transverse stiffeners were introduced in the pan, to achieve a balanced system design. • Transverse stiffeners reduce the deflection of the pan, increasing the wind uplift resistance. • The ultimate wind-uplift resistance of Klip-Tite exceeds expectations. • Klip-Tite has retained the superb properties normally associated with Klip-Lok 700. • Transverse stiffeners are a first in the South African sheeting market. Talk to us, The Smart Roof People on 011 898 2900 or visit www.globalroofs.co.za or email info@globalroofs.co.za
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GLOBAL ROOFING SOLUTIONS
2016
TopRoof YOUR SOUTH AFRICAN ROOFING MAGAZINE
Your Top Specialized Roofing Magazine Don’t miss a great advertising opportunity Contact us for more information: +27 (0) 75 510 5802 | info@za-media.co
Without visible identification (branding) on your roof sheet, your investment carries no guarantee, and is probably a cheap imitation! You’ll find branding along the edges of your roof sheet, at regular, 1 metre intervals. If not, ask why!
T 0.5
the total thickness of roof sheet 0.47 is not 0.5!
W
width of coil to profile effective cover of .686 IBR, Widespan or Corrugated .762 mm roof sheets
Z275 = 275g of galvanizing Date and time of manufacturing Coil number for traceability Date and time for guarantee and expected lifespan.
Z275 have a 100% longer expected lifespan than Z150. 0.5 Z275 is the minimum standard from the NHBRC, government and financial institutions.
Tel + 27 16 986 8000 | Fax + 27 16 986 8050 | info@clotansteel.co.za www.clotansteel.co.za
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www.ashandlacy.com www.ashandlacy.co.za TITLE: AshgridTM has Pick ‘n Pay Covered
CASE STUDY: Pick n Pay Hypermarket, Ottery, Cape Town Client: Redefine Properties Project Management: Slabber Fick & Associates Quantity Surveyors Contractor: Chartwell Roofing Cape The Pick n Pay Hyper building in Ottery, Cape Town is a well-known landmark to most Capetonians and a hive of activity seven days a week. The building is managed by Redefine properties who recently had the unenviable challenge of having to attend to the roof which over the years had begun presenting more and more water ingress problems. Redefine Properties and Pick n Pay had concerns regarding the risks associated with conventional roof replacement. There were particular concerns about public health and safety, costly disruption of trade, inclement weather and possible resultant damage to property and stock when removing the existing roof covering. Furthermore the original design of the roof posed additional challenges. The original low pitched design of the roof had incorporated a number of steps in the roof planes to accommodate the maximum transportable lengths of roof sheets available in the market at the time of construction. The majority of the roof leaks being experienced originated at these steps in the roof. The Ashgrid spacer system with its variety of bracket heights provided the ideal solution to eliminate these steps whilst accommodating site rolled longspan concealed fix roof sheets ideally suited to low pitched roof designs. The Ashgrid over-roofing system was selected over alternative untested systems due its proven 15 year track record, comprehensive testing, engineered design & wide range of bracket heights. Three different heights of Ashgrid Systems were specified to eliminate the existing steps in the roof namely 85mm, 135mm & 190mm. The existing roof covering and flashings were left in position providing an excellent work surface for the contractor namely Chartwell Roofing. The Ashgrid bars and brackets were assembled on the roof prior to installation and the unique patented ‘twist & lock’
SECTION NAME
2
technology of the system allowed for the brackets to be easily re-spaced along the bars to accommodate the profiles of the existing roof covering. The pre-assembled brackets & bars were then fixed to the existing steel purlins by means of 25mm self-drilling fasteners which were drilled through the pans of the existing roof sheets. The new Zincalume Kliplok 406 longspan concealed fix roof sheets were rollformed on site by Global Roofing Solutions and installed to the engineered Ashgrid bars by means of concealed fix clips and self-drilling fasteners. Despite the project being undertaken in Cape Town’s ruthless winter the entire refurbishment process was carried out without any disruption to Pick n Pay’s busy trade whilst exponentially improving health & safety for both the contractor and the shoppers below. Chris Ball, director of Chartwell Roofing Cape commented ‘The Ashgrid spacer system provided the perfect solution to what would have been a high risk & challenging re-roofing project. The system was incredibly quick and easy to install which allowed Chartwell Roofing to achieve a very tight critical path program in challenging weather conditions. Ash & Lacy South Africa’s onsite technical support and know-how proved invaluable on this prestigious and highly successful project.
B u s i n e s s M a g a z i n e | A p r i l 2 0 11
1
HEALTH & SAFETY GUIDELINES WHEN OVER-ROOFING AN EXISTING ASBESTOS CEMENT ROOF INTRODUCTION
EXPLANATORY NOTE
Due to problems in old asbestos cement and latterly fibre cement profiled roofs and their roof-lights, it has become common place to “over sheet� the existing roofs with a spacer system and new profiled metal sheets. Reasons are threefold: expensive and hazardous roof removal and disposal is avoided, environmental damage is averted, additional insulation can be installed ensuring compliance with energy efficiency regulations and operations within the building can continue without disruption. The enclosure of the asbestos-cement roof sheets prevents any further risk of weathering or deterioration rendering the material inert and safe for the remainder of the life cycle of the building.
B u s i n e s s M a g a z i n e | A p r i l 2 0 11
It has been established through consultation with industry colleagues that as with most roofing activities there are different views on how tasks should be carried out for particular situations, and for many reasons over-roofing existing fragile roofing materials is no exception. As with most guidance documents we cannot be prescriptive. It is therefore essential that all companies embarking on this type of work make themselves aware of the hazards likely to be encountered and implement the control measures necessary to reduce the risks to the minimum possible. METHOD The Ashgrid bar & bracket spacer system is secured through the troughs of the existing asbestos cement roof sheets into the underlying purlin. The drilling process is carried out in conjunction with an H-Series Asbestos certified vacuum which captures 100% of the dust produced. Insulating the resultant cavity is highly recommended and with certain building occupancy classes is mandatory in order to comply with SANS 10400XA. A suitable outer weather sheet is then installed to the new Ashgrid bars using conventional fixing methods.
PLANNING A comprehensive survey of the existing roof and its location must be undertaken to establish its suitability for over-roofing. Factors to be considered include: •Condition of asbestos cement sheets (friable or damaged), roof-lights and glazing. •Suitability of roof and gutters to accept selected system. •Adequacy of existing structure to accept additional load of selected system. •Internal access for installation of safety and debris nets. •External access for installation of scaffolding, loading platforms and edge protection. •Presence of over-head high power electricity cables. •Suitability of access and ground conditions for crane or other means of hoisting materials to roof level. SAFETY MEASURES Before work commences a comprehensive risk assessment must be carried out to identify the specific hazards and control measures required to ensure the health & safety of both roof workers and others in the vicinity who may not be involved, but might be affected. These will include: •Prevention of exposure to asbestos fibres in the unlikely event they are released during the fixing of spacer system brackets through the roof sheet. •Prevention of falls through fragile roof surfaces for people, equipment and replacement materials. •Prevention of persons falling from roof edges or into the building. •Prevention of debris arising from work, falling from roof edges or into the building. •Hoisting and distribution of materials to, along and over the roof. •Means of rescuing persons as a result of falls into nets or suspension from harnesses. •Measures to protect others below or in the vicinity of the work. •Establish and ensure the ability of the operatives to carry out the work safely, their experience, qualifications and training received. •Ensure materials to be installed are classified non-fragile. NOTE: This is not an exhaustive list, the onus remains with the contractor to ensure that all possible precautions to minimise risk are considered.
ng system is devised in consultation with the client/buildACCESS &and EGRESS TO AND FROM ROOF rs above that appropriately supervised, trained, qualiis vital that a safe means of access and egress is established for the roof work. The most effective rk. Itmeans of providing a safe working environment and ease of access around a fragile roof is a fully boarded perimeter scaffold positioned no more than 300mm below eaves level that includes additional lifts at gable ends. The preferred method of access and egress to and from the scaffold platform is via a purpose-fitted staircase.
hould be the safety nets which are established as an effecscaffold shouldinternally provide perimeterclose edge protection and ideally means of manoeuvring materials into y be This installed to the underside of the existposition and fixing the initial row of 1 metre long spacers from the gable and the first tier of sheets without accessing the roof. nsideration must be given to ensuring sufficient clearance The scaffold bays for mechanically-hoisted roof sheets and eflection of should the incorporate safety purpose-designed net when loading arresting a persons fall. materials. These should be strategically positioned to reduce as much as possible unnecessary manual handling of the new roof materials at roof level. All hoisting arrangements must be subject to prior planning and be initiated and supervised by competent persons.
e thePriorcontractor from his duty to minimise the risk of falls to roofing materials being loaded directly onto the roof structure, the adequacy of the roof to accept the additional loads must becrawling verified as acceptable by a qualified engineer.items of equipoofing-work and boards orstructural similar All hoistingfragile arrangements must be subject to prior planning, initiated and supervised by a competent person. e existing roof.
SAFE SYSTEMS OF WORK internally, alternative steps must be taken to prevent falls It is essential that a method working system is devisednets in consultation the client/buildan include the usestatement/safe of sacrificial safety thatwithare left in ing occupant that will take into account the factors above and that appropriately supervised, trained, qualified and experienced operativesdue are usedconsideration for the work. w sheets. However, must be given to the The preferred option to prevent injury from falls should be the safety which are established as an effecbefore deciding to use this system and nets the controls necestive form of fall protection. They should preferably be installed internally close to the underside of the existroof to provide collective protection. Due consideration must be given to ensuring sufficient clearance nets.ing over racking and other equipment to allow for the deflection of the safety net when arresting a persons fall. It should be noted that safety nets will not relieve the contractor from his duty to minimise the risk of falls through the existing fragile roof during the over roofing-work and crawling boards or similar items of equipment must be used if operatives need to traverse the existing fragile roof. Where it is not practical or possible to install nets internally, alternative steps must be taken to prevent falls through the existing fragile roof material, these can include the use of sacrificial safety nets that are left in position over the existing roof and below the new sheets. However, due consideration must be given to the additional risks the net installers will encounter before deciding to use this system and the controls necessary when working over fragile roofs to install these nets.
king system is devised in consultation with the client/buildtors above and that appropriately supervised, trained, qualiork.
should be the safety nets which are established as an effecbly be installed internally close to the underside of the existonsideration must be given to ensuring sufficient clearance deflection of the safety net when arresting a persons fall.
ve the contractor from his duty to minimise the risk of falls These must be adequately secured around the perimeter of the roof and to each other. However, it should be roofing-work crawling boards orusedsimilar noted that this optionand is generally only suitable for profiled sheets with a bracketitems and bar or of a topequipfix zed bar over cladding system. he existing fragile roof. Safety nets for all applications must be installed by trained and competent installers in a manner that does not pose additional risks to the installer or building occupants.
ts internally, alternative steps must be taken to wide prevent falls Other options include the use of lightweight timber crawling boards, a minimum of 600mm positioned strategically and spanning at least three purlins at the leading edge and utilising the new roof as a working platform. canWhere include the use of that sacrificial safety nets that are left practical and possible, a system incorporates means of attaching safety harnesses should be uti- in lised, when working from crawling boards without the safety nets. If not utilised, sufficient crawling boards must ew sheets. However, due consideration beforgiven to the be used to safely manoeuvre enough of them in turn to ensure continuity must of fall protection the whole leading edge. Some longer crawling boards are manufactured to provide harness securing points. However, their size before to touse this system and can makedeciding them heavy and difficult move over a profiled sheet safely and this canthe create ancontrols additional hazard.necese nets. Short lightweight boards spanning no more than three purlins are easier to move and will always provide a platform from which to move the one adjacent to it as work progresses if utilised correctly.
The decision to implement any process will be governed by a number of site-based factors and the need to provide the optimum protection for those working on roofs or below roof work. RESCUE PLAN Where fall arrest systems such as nets and harnesses, rather than fall prevention methods are utilised, members are reminded that a specific rescue plan must be established in accordance with the Occupational Health & Safety Regulations.
DEBRIS AND INSTALLATION
DUST
RESULTANT
FROM
To provide adequate fixing positions for spacer systems that will support the new roof, holes will be drilled through the existing asbestos/fibre cement profiled sheet. It is essential that steps are taken to prevent the dust emanating from this process from releasing fibres into the building or atmosphere. The preferred option is the use of a specialised H-series vacuum. All drilling is carried out in conjunction with a specialised H-Series vacuum which is designed to capture any dust and asbestos fibres created during the drilling process. This powerful vacuum cleaner is fitted with a Ulpa Filter for 99.999% efficiency at 0.12 micron. It is ESD safe, meets HSG264 standards of surveying and is fully compliant with BS EN 60335-269. https://youtu.be/QNemGnOf_kQ
The use of self-drilling/tapping screws to form the holes provides an opportunity to apply a light grease or similar substance to the screws before use. Alternatively, a coating of wallpaper paste or similar substance may be applied to the original roof along the spacer fixing line. The substance used will collect dust emanating from the drilling process aided by the spiral thread on the screws and will prevent it being released into the atmosphere when the holes are drilled. Any debris created through accidental breakage must be treated as hazardous waste thoroughly damped down and placed in sealed bags for disposal at a licensed site.
PERSONAL PROTECTION It is unlikely that asbestos fibres of any significant quantity will be released into the air during this type of work. However, extra precautions to protect the people carrying out the work must be considered and subject to risk assessment. These will include the use of disposable overalls and FFP3 filter masks appropriate for the wearer. NOTES These advisory measures are not exhaustive; they are intended to provide advice on methods that can be adopted or adapted to ensure that the work is carried out as safely as possible. Roofing contractors are free to select any method that is safe to use and supported by a robust risk assessment and is compliant with all current legislation. In accordance with the South African regulations there is no requirement to be registered as an approved asbestos contractor to carry out asbestos roof enclosure. It is however still a requirement that an employer or self-employed person notify the Provincial Director of the Department of Labour in writing prior to the commencement of asbestos work and to ensure that written procedures are laid down and followed to prevent the release of asbestos dust into the environment. All suitable Health and Occupational Safety precautions should be followed whilst carrying out the work. *All asbestos work to be carried out in South Africa should be in accordance with Government Gazette Regulation No. 7276 Vol. 440 Pretoria 10 February 2002 No. 23108
That's Another Storey! Ark Attics is a Cape Town (Northern Suburbs) based roof space development company. We believe that the planning and design phase is most important, as decisions cannot be left until the building work is in progress. This is why we come out to your site to plan roof alterations with you. The position and orientation of your stairs, for instance, cannot be left until last as the whole top floor must be planned around it. We prefer to discuss and design the attic first, and then forward our attic design to our (or your) architect to use in the council plans. What sets us apart? We do a full Engineering Design of the new loft structure, on industry leading roof design software from MITEK, which conforms to the SANS (see 3D pictures above). All trusses and timbers are provided by a licensed MiTek roof truss fabricator (Pennypinchers Trusses & Timber). The Roof Inspections & Roof Certificate is done by an independent engineer.
Loft construction begins
Engineered trusses installed
Dormer construction
Oregon pine staircase
Deck completed
Living room
Small bedroom before Small bedroom after
Five loft windows visible
Contact Us Cell: 082 894 9794
Website: atticroofs.co.za
Email: izakburger42@gmail.com
CLASSIFIED SECTION PROMPT ROOFING No House Roof nor Factory Roof is considered too small or too big for us. We fix HOMES (roof repairs and roof leaks) and Industrial Roofs in Gauteng. CALL NOW FOR A FREE QUOTE 0113922809 | 0828559435 | 0614709975 | 0814443605
WILCOTE is conversant and highly experienced with the restoration and repair of all types of Roofs. These roofs include the following: • Re-roofing of IBR, Corrugated & Aluminium Roofs. • Roof Restoration and roof repair of IBR, Corrugated Iron or Asbestos. • Specialized Waterproofing for low pitch roofs. • The Restoration of Slate Roofs. • The Roof Repair & Restoration of Marseille and Clay Tile roofs. • Harvey Tile, Clip-lok and Dek-tile Roof installation. WILCOTE manufacture a wide range of guaranteed products and coatings for the Restoration of all types of Roofing, including Thatch Roofs. Contact Wilcote – 033 346 0962
BETELE CONTRACT ROOFING CC We specialise in the supply and fixing of: 1. Metal sheet roofing 2. Concrete roof tiles. 3. Timber/trusses. 4. Slate roof covering. 5. Reroofing of Existing roofs. 6. Maintenance on existing roofs. You, our customers, have always been our highest priority and we will still offer you our best service an attention at all times. I have been intricately involved in all aspects of the roofing construction for the past 21 years and BETELE CONTRACT ROOFING cc will therefore also endeavour to give excellent and professional service. I sincerely Appreciate all the work and support you have given me over the years and wish to assure you that my focus in the new company will be to give a better and more efficient product and enhanced service to all customers. Should you have any questions or enquiries, please feel free to contact me on the details below.
FERDI ACKERMAN Cell No: 061 474 0474 Email: bcrroofing@telkomsa.net / bcroofing2010@gmail.com Fax: 086 613 9648 | Office: 081 742 9790 | P O Box 4011, Witbeeck 1729
CLADALL ROOFING Established in 1987 in the Eastern Cape city of Port Elizabeth in Nelson Mandela Bay, Clad-All Roofing is a leading roofing specialist and ranks among the top ten roofing companies in South Africa. With an established, national reputation for excellence in its field of operation, Clad-All Roofing operates as an independent, privately owned company. FERDI ACKERMAN Cell No: 061 474 0474 Email: bcrroofing@telkomsa.net / bcroofing2010@gmail.com Fax: 086 613 9648 | Office: 081 742 9790 | P O Box 4011, Witbeeck 1729Email: bcrroofing@telkomsa.net / bcroofing2010@gmail.com Fax: 086 613 9648 | Office: 081 742 9790 | P O Box 4011, Witbeeck 1729
ROOFING AND WATERPROOFING EXPERTS based in Durban, KwaZulu-Natal Since 1971, Suburban Roofing has serviced a broad base of Commercial, Industrial &Domestic clientele. “We have worked hard to get to the top or our profession. We’ve built our solid reputation, one roof at a time. So for any roofing job, know that... We’ve got you covered!” · Contact: Tel:+27 31 312 9257 | Fax:+27 31 312 2609 Suburban House De Charmoy Trade Park 26/30 Oldham Road Stamford Hill, Durban 4001
ROOFING AND WATERPROOFING EXPERTS Prinsloo and Zeeman provide tailored solutions to the construction and building maintenance industry in the commercial, industrial and domestic sectors in Cape Town. We service clients according to national best practice standards across a wide spectrum of building, renovations and restoration projects. CONTACT DETAILS Unit 4, Strella Park, 8 Engine Avenue, Montague Gardens T: 021 555 1422 E: prinsloo@kingsley.co.za OTHER BRANCHES : S. Suburbs : 021 683 6114/5 City Bowl : 021 465 2682 N. Suburbs : 021 555 1422 Fax : 021 551 5939
LEITH ROOFING CAPE TOWN, SOUTH AFRICA Established in 1952, we are experienced roofing contractors. We specialize in both Domestic Roofing and Industrial Roofing in Cape Town and the Western Cape. We cater for New Roofing and Reroofing of all Sheet Roofs, Tile Roofs, Slate Roofs and Timber Roof Structures. We are dedicated to top quality roofing and personalized service. Address: 15-17 Glosderry Road Claremont 7708 Cape Town South Africa Telephone: (021) 671-3126/27/28 | Facsimile: (021) 671-2966 | E-mail: ruth@leithroofing.co.za Fax : 021 551 5939
LEADING ROOF TRUSS SYSTEM SUPPLIER IN SA AND THE WORLD
Prefabricated timber roof trusses
• Light Gauge Steel Trusses • Steel Wall Framing
eCo Fasteners® are timber and steel fastening devices that provide strong and rigid connections to any building structure. A network of more than 190 licensed roof truss manufacturers across South Africa, provides a competitive and economic solution to even the most complex of roofing problems. This MiTek fabricator network, using MiTek’s state-of-the-art software programs, provides high quality, purposeengineered truss units to satisfy the need of an ever increasing complex roof market. The scope of MiTek’s services includes not only unrivalled expertise in terms of professional structural engineering service but also the extensive Research and Development into all aspects of timber and light gauge steel roof design and construction as well as a full range of manufacturing equipment - that makes MiTek a World Leader. creating the advantage World Leaders since 1956. MiTek Park,754 16th Road, Randjespark, Ext. 34, Halfway House,1685. Midrand (Head Office) Tel: + 27(0) 11 237 8700 Cape Town Tel: 021 905 0244 • Durban Tel: 031 700 6332 • Port Elizabeth Tel: 041 581 7525 email: marketing@mitek.co.za • www.mii.com/southafrica *MiTek
Industries South Africa (Pty)Ltd, a division of the worldwide MiTek Group.