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Types of Green Roof There are two basic types of green roof, extensive and intensive, with a number of variations making four green roof types.

Extensive Green Roofs Lightweight with a relatively shallow substrate, providing a colourful carpet of planting comprising sedum and hardy plants. Requiring minimal maintenance and no irrigation, extensive green roofs provide a 'back to nature' look and offer strong ecological benefits. They are not normally designed to provide access for leisure use.

Extensive

Biodiverse Green Roofs These are a form of extensive green roof where the substrate is laid down and then planted with vegetation that is suitable for the local environment.

Semi-intensive Green Roofs Provide a more varied landscape that can include shrubs and woody plants - but still with a low build-up. Limited but scheduled maintenance and irrigation are required. With semi-intensive green roofs, ecological benefits are combined with access for recreational use.

Intensive Green Roofs Offering the benefits of a small urban park, providing a rich habitat for wildlife as well as recreational access for people. Intensive green roofs have a deep substrate which can support a range of plants, trees and shrubs. Regular maintenance is required. Biodiverse

Semi-intensive

Intensive

Alumasc Technical Helpline 01744 648400

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2

4

5

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6

7

10

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30

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5

6

8

12

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variable

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Weight kg/m2

Depth

Fig 23: Warm Roof Solution

Depth

Weight kg/m2

Fig 22: Inverted Roof Solution

8

9

9 1

Sedums

1

Sedums

2

Alumasc ZinCo sedum carpet substrate

2

Alumasc ZinCo sedum carpet substrate

3

Filter Sheet SF

3

Filter Sheet SF

4

Floradrain® FD 25-E drainage layer

4

Floradrain® FD 25-E drainage layer

5

Alumasc MK Separator

5

Moisture Mat SSM 45

6

Alumasc Roofmate TF/A insulation, thickness to suit U-value required

6

Derbigum Anti-Root waterproofing system

7

Hydrogard 40 root barrier

7

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8

Hydrotech MM6125 waterproofing

8

Vapour barrier

9

Roof construction

9

Roof construction

Table 8: Systems summary Build-up height

approx 100mm

Wet weight (including plants)

approx 108kg/m2

Water retention capacity

approx 23l/m2

Features - Floradrain® FD 25-E green roof ■ Ideal for extensive green roofs with a variety of hardy, drought-resistant planting – the ecologically sound alternative to gravel coverings. ■ Suitable for roofs with a slope up to 10°. ■ Requires minimum care and attention. ■ Offers various design possibilities with hardy planting and can include footpaths and terraces. ■ The construction is resistant to flying sparks and is a ‘hard roof’ in accordance with German Building Standard DIN 4102 dealing with fire resistance. ■ The drainage layer meets the requirements of German Building Standard DIN 4095.

Alumasc Technical Helpline 01744 648400

37


Lightweight Extensive/Biodiverse Installation

Zero Falls Roofs Floraset FS50 Floraset FS50 is a lightweight drainage board specifically for use on roofs with little or no drainage falls. Made of partly recycled CFC free polystyrene, the board provides water retention and allows drainage, whilst minimising the possibility of any potential standing water from interfering adversely with the essential airspace beneath the board.

The board collects water in its storage cells, whilst a multi-directional channel system on the underside allows positive drainage of any excess. Ventilation and provision for evaporation is by means of perforations through the board. Normal levels of foot traffic can be accommodated by the product. The use of the TSM32 separation and protection mat beneath the product ensures efficient and even dispersion of any ponding water, allowing maximum uptake by the vegetation. A typical system utilising 70mm of Rockery Type substrate can retain up to 33 litres of water per square metre.

Table 8a: Technical data

38

Material

Recycled expanded polystyrene

Height

50mm

Weight

0.7kg/m2 dry, 2.7kg/m2 wet

Dimensions

1m x 1m

Water retaining capacity

2l/m2

Alumasc Technical Helpline 01744 648400


Depth

Weight kg/m2

Fig 24: Extensive/Biodiverse Green Roof with Floraset FS50

1

Sedums

2

Alumasc ZinCo sedum carpet substrate

3

Filter sheet SF

4

Floraset FS 50

5

TSM 32 moisture mat

6

WSF40 root barrier

7

Waterproofing

8

Roof construction

5

88

12

70

50 15

Table 9: System summary Build-up height

approx 135mm

Wet weight (including plants)

approx 105kg/m2

Water retention capacity

23l/m2

Features - Floraset FS 50 green roof ■ Provides a low maintenance green roof landscape on roofs with little or zero falls ■ Floraset FS 50 contains recycled material and is blown with a CFC free agent ■ Requires minimum care and attention ■ The construction is resistant to flying sparks and is a 'hard roof' in accordance with German Building Standard DIN 4102 dealing with fire resistance ■ The drainage layer meets the requirements of German Building Standard DIN 4095

Alumasc Technical Helpline 01744 648400

39


Lightweight Extensive or Biodiverse Installation 8-25ยบ Sloped Roofs Floraset FS 75 Floraset FS 75 is a drainage board manufactured from recycled CFC-free expanded polystyrene. It is used principally on inclined roofs over 10ยบ and up to 25ยบ in pitch. Boards are laid loose and overlapped. Floraset FS 75 can also be used on flat roofs, but it is important to lay the product right side up, depending on the type of application. On pitched roofs the deeper profile should always be laid upwards for better retention of substrate. Floraset FS 75 is suitable for both extensive and intensive green roof installations.

Floraset FS 75 - the green roof solution for inclined roofs.

Table 10: Technical data

40

Material

Recycled expanded polystyrene

Depth

75mm

Weight

1.5kg/m2

Dimensions

1x1m

Alumasc Technical Helpline 01744 648400


10

105

10

1

Biodiverse Landscape

2

Jute anti-erosion net JEG

3

ZinCo Rockery Type Substrate

4

Floraset FS 75 drainage layer

5

BSM 64 moisture mat

6

Derbigum Anti-Root waterproofing

7

Roof Construction

Depth

Weight kg/m2

Fig 25: Extensive or Biodiverse Sloping Green Roof with Floraset FS 75

50

80

Table 11: System summary Build-up height

approx 130mm

Wet weight (including plants)

approx 100kg/m2

Water retention capacity

approx 30l/m2

Features - Floraset FS 75 green roof ■ Provides a low maintenance extensive green roof landscape on inclined roofs. ■ Floraset FS 75 is 100 per cent recycled polystyrene, blown with CFC-free agents. ■ Deep profiles secure the substrate and prevent slippage. The interlocked Floraset FS 75 drainage boards provide excellent resistance to shear forces and safeguards against the threat to eaves stability. ■ Designed for roof pitches up to 20º without additional cross battening. Above 20º cross battens are required to counteract shear forces. Maximum roof pitch is 30º. ■ Roofs steeper than 15º, or sites subject to strong wind uplift, require the incorporation of a jute anti-erosion net to prevent substrate depletion. ■ The construction is resistant to flying sparks and is a ‘hard roof’ in accordance with German Building Standard DIN 4102 dealing with fire resistance.

Alumasc Technical Helpline 01744 648400

41


Lightweight Extensive/Biodiverse Installation Standing Seam Roofing Systems Floradrain® FD 25-E or FD 40-E Strip The Armaseam® standing seam roof System is the ultimate metal substrate for green roofs. The material properties of aluminium, the penetrative-free fixing method, and the absence of any lap joints offer an excellent long term solution. The flexibility of standing seam roofs - curvature (from 6m upwards) and pitches (down to 1.5°) enhance green roof design possibilities. At steeper pitches, baffle plates can be used to restrain the growing medium without penetrating the metal roofing substrate. Floradrain drainage layers are supplied pre-cut to suit the standing seam module. The filter sheet, installed above, ensures that fines do not block the drainage holes. Alumasc ZinCo growing medium (50 to 70mm) is then installed before planting (eg, sedums, rockery plants, herbs).

42

Alumasc Technical Helpline 01744 648400


Fig 26: Eaves

Table 12: Technical data Green Roof Depth

Approx. 100mm

Green Roof Weight (wet)

Approx 110kg/m2

Armaseam Sheet Weight

3.55kg/m2

Weight and depth of overall construction is subject to structure and U-value.

Features - Extensive Green Roof on Standing Seam ■ Aluminium offers a long, corrosion-free life requiring little or no maintenance - after which it is 100% recyclable.

Fig 27: Section

■ Secret-fix roof system - no holes, no leaks - suitable for low pitched and curved roofs. ■ Lightweight aluminium weatherproofing, reducing loads to structure. ■ Insulated standing seam construction, achieving an 'A' rating in the Green Guide to Specification (3rd Edition). ■ Suitable for retro-fitted green roofs.

Alumasc Technical Helpline 01744 648400

43


Lightweight Semi-Intensive and Intensive Installation Low Pitched Flat Roofs Floradrain® FD 40-E Floradrain® FD 40-E is identical to Floradrain® FD 25-E, but with an increased depth of 40mm. This gives sufficient increased water storage capacity to support both extensive and intensive green roofs. Rainfall collects in the storage cells. Roots are supplied with both air and water through capillary action. Water is also held in moisture mats that protect the waterproof membrane whilst retaining moisture and nutrients. Excess water drains away beneath the drainage layer. ZinCo extensive green roof solutions from Alumasc include special substrates for both extensive and intensive green roofs. Hardy, drought and frost-resistant plants are required for low maintenance extensive roofs, whilst a Floradrain® FD 40-E roof with greater substrate depth can support more intensive planting with small shrubs.

Table 13: Technical data

With Floradrain® FD 40-E design possibilities are wide ranging and can include pedestrian areas such as footpaths and terraces.

Examples of semi-intensive green roofs

44

Alumasc Technical Helpline 01744 648400

Material

High density polyethylene (HDPE)

Height

40mm

Weight

2.2kg/m2 dry, 6.2kg/m2 wet

Dimensions

2m x 1m or rolls 10m x 1m

Water retaining capacity

4l/m2

Maximum pressure load (empty)

170kN/m2

Maximum pressure load (infilled)

250kN/m2 approx


Depth

Weight kg/m2

Fig 28: Semi-Intensive/Intensive Green Roof on Inverted Roof with Floradrain® FD 40-E

10

1

Semi-intensive plants – lavenders, woody plants, wild flowers

204 150

2

Alumasc ZinCo Heather with Lavender substrate

3

Filter Sheet SF

4

Floradrain® FD 40-E drainage layer

5

Alumasc MK Separator

6

Alumasc Roofmate TF/A insulation – thickness to suit U-value required

7

Hydrogard 40 Root Barrier

8

Hydrotech MM6125 or Derbigum Anti-Root waterproofing

9

Roof construction

variable

45

variable

7

12

10

Table 14: System summary Build-up height

approx 195mm

Wet weight (including plants)

approx 220kg/m2

Water retention capacity

approx 80l/m2

Features - Floradrain® FD 40-E green roof ■ Ideal for extensive green roofs with a variety of hardy, drought-resistant planting – the ecologically sound alternative to gravel coverings. Increased depth provides sufficient water storage capacity to make Floradrain® FD 40-E also suitable for intensive green roofs. ■ Suitable for flat roofs and roofs with a slope up to 10°. ■ Suitable for flat roofs with no falls in cases where residual ponding is less than 40mm, thereby keeping the substrate clear of the water beneath. ■ Offers various design possibilities with a variety of planting, and can be used for areas of pedestrian traffic such as footpaths and terraces. ■ The construction is resistant to flying sparks and is a ‘hard roof’ in accordance with German Building Standard DIN 4102 dealing with fire resistance. ■ The drainage layer meets the requirements of German Building Standard DIN 4095.

Alumasc Technical Helpline 01744 648400

45


Intensive Installation Low Pitched and Zero Falls Flat Roofs Floradrain® FD 60 Floradrain® FD 60 has a greater depth than either Floradrain® FD 25-E or FD 40-E. It is ideal for virtually any type of intensive green roof landscape, including roof gardens, terraces, play areas, water features, roadways and car parks. Rainfall collects in the storage cells, which have significantly more water transfer capacity than FD 25-E and FD 40-E. Roots are supplied with both air and water through capillary action. Water is also held in moisture mats that protect the waterproof membrane whilst retaining moisture and nutrients. Excess water drains away beneath the drainage layer. Floradrain® FD 60 is so strong it can be used as shuttering for concrete, forming the base for roadways.

Lawned intensive green roof with Floradrain® FD 60 drainage layer

Table 15: Technical data

Footpaths Drives Roadways

Fig 29: 46

Alumasc Technical Helpline 01744 648400

Material

ABS-Plastic

Height

60mm

Weight (Dry)

2.3kg/m2

Weight (Wet with infill)

43kg/m2

Dimensions

1m x 2m

Water retaining capacity (filled with Zincolit)

5l/m2

Maximum pressure load (empty)

19kN/m2

Maximum pressure load (infilled)

75kN/m2

Extensive planting

Intensive planting


Depth

1

variable

60

variable

39

Intensive landscape – lawns, shrubs and bushes – with greater depth of substrate, bushes and small trees can be included in the green roof landscape

2

Alumasc ZinCo Roof Garden substrate

3

Filter Sheet SF

4

Alumasc Zincolit infill

5

Floradrain® FD 60 drainage layer

6

Alumasc MK Separator

7

Alumasc Roofmate TF/A insulation – thickness to suit U-value required

150 to 1500

140 kg per 100mm

ask advice

Weight kg/m2

Fig 30: Intensive Green Roof on Inverted Roof with Floradrain® FD 60

12

10

8

Hydrogard 40 Root Barrier

9

Hydrotech MM6125 or Derbigum Anti-Root waterproofing

Table 16: System summary Build-up height

from approx 220mm, plus insulation

Wet weight (including plants)

from approx 270kg/m2

Water retention capacity

starts at 90l/m2

Features - Floradrain® FD 60 green roof ■ A highly versatile, multi-functional system for intensive green roofs that is capable of supporting virtually any form of green roof landscaping. ■ Suitable for walkways, paths, terraces, play areas, water features, and vehicular areas such as drives, roadways and car parks. ■ Can be used as shuttering for concrete in the construction of roads and foundations without impeding drainage over the waterproofing membrane. ■ On roofs with no falls, FD 60 can be used with the ZinCo Roof Dam water storage system, and also with the Alumasc ZinCo automatic irrigation control system, or the ZinCo HydroSolar system with solar powered irrigation control - see pages 48 - 49. ■ The construction is resistant to flying sparks and is a ‘hard roof’ in accordance with German Building Standard DIN 4102 dealing with fire resistance. ■ The drainage layer meets the requirements of German Building Standard DIN 4095.

Alumasc Technical Helpline 01744 648400

47


Intensive Installation Zero Falls Roofs with Reservoir Irrigation Floradrain® FD 60 4 2 3

1 5

7

6 8

9

Fig 31: ZinCo Irrigation System By making use of the 60mm depth of the FD60 profile, the drainage board is used to create a 40mm deep reservoir underneath the green roof substrate when installed on a dead flat structure. By the process of evaporation, the water in the reservoir will expirate into the substrate above, maintaining the correct level of moisture within the substrate and thus ensuring healthy vegetation. The reservoir is kept topped up by the use of cistern-type irrigation units, which can either draw additional water from the mains or, if a harvesting system is used to gather excess rainwater, by use of a photovoltaic powered pump which can draw water from the harvest system storage. The significant reduction in potable water usage of this system over traditional sprinkler irrigation installations, due to there being only minimal loss to evaporation, makes this system particularly well suited to developments where water supply is metered.

48

Alumasc Technical Helpline 01744 648400

1

Alumasc ZinCo Roof Garden Substrate

2

20–40mm round pebble vegetation barrier

3

ZinCo inspection chamber

4

ZinCo irrigation unit

5

Filter sheet SF

6

Floradrain® FD 60 drainage layer with Alumasc Zincolit infill

7

ZinCo Roof Dam damming piece

8

Hydrotech 6125 waterproofing with Hydrogard 40 root barrier

9

Harmer outlet with flat grate


Depth

1

Alumasc ZinCo Roof Garden Substrate

3

Filter sheet SF

4

Alumasc Zincolit infill

5

Floradrain® FD 60 drainage layer

12

10

6

40mm reservoir

7

Hydrogard 40 root barrier

8

Hydrotech MM6125

variable

60

variable

64

Intensive landscape - lawns, shrubs and bushes - with greater depth of substrate; bushes and small trees can be included in the green roof landscape

2

150 to 1500

140 kg per 100mm

ask advice

Weight kg/m2

Fig 32: Irrigated intensive green roof on inverted roof to zero falls with Floradrain® FD 60

Table 17: System summary Build-up height

from approx 220mm

Wet weight (including plants)

from approx 290kg/m2

Water retention capacity

starts at 90l/m2

Features - Irrigated Floradrain® FD 60 green roof to zero falls ■ A highly versatile, multi-functional system for intensive green roofs that is capable of supporting virtually any form of green roofing. ■ Automatic irrigation system maintains a 40mm water reservoir during the growing season. ■ The construction is resistant to flying sparks and is a ‘hard roof’ in accordance with German Building Standard DIN 4102 dealing with fire resistance. ■ The drainage layer meets the requirements of German Building Standard DIN 4095.

Alumasc Technical Helpline 01744 648400

49


Intensive Installation â&#x20AC;&#x201C; Predominantly Hard Landscape Elastodrain EL 200 and EL 202 Elastodrain EL 200/202 are heavy duty protection and drainage mats of solid rubber, designed for use on recreational intensive green roofs and landscaped underground car parks. Elastodrain is also suitable for pathways, terraces, play areas, and is strong enough for vehicular traffic. Elastodrain EL 200 has a 6mm base with 14mm projections to support the landscape above. An especially stiff filter sheet (Filter sheet TG) is required. Elastodrain EL 202 has twice the number of projections and has exceptional resistance to compression. It is suitable for roads bearing heavy vehicles, and can withstand traffic from site plant during installation. Elastodrain EL 200/202 is ideal for recreational green roofs which need to withstand heavy traffic. Table 18: Technical data

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Alumasc Technical Helpline 01744 648400

EL 200

EL 202

Material

Recycled rubber

Rubber

Thickness

20mm

19mm

Weight

14kg/m2

18kg/m2

Studs

600/m2

1200/m2

Dimensions

1m x 1m

1m x 1m


20

variable

variable

14

150 to 1500

140 kg per 100mm

ask advice

Depth

Weight kg/m2

Fig 33: Intensive Green Roof on Warm Roof with Elastodrain EL 200 or EL 202

1

Intensive landscape – lawns, shrubs and bushes – with greater depth of substrate, bushes and small trees can be included in the green roof landscape

2

Alumasc ZinCo Roof Garden substrate/Zincolit

3

Filter Sheet TG

4

Elastodrain EL 200 or EL 202 drainage layer

5

Derbigum waterproofing with integral root barrier

6

Derbifoam Polyurethane insulation, thickness to suit U-value required

5

Vapour barrier

8

Roof construction

Table 19: System summary Build-up height

approx 220mm

Wet weight (including plants)

approx 320kg/m2

Water retention capacity

approx 74l/m2

Features - Elastodrain EL 200/EL 202 green roof ■ A heavy duty system for use on recreational intensive green roofs and underground car parks. ■ Can withstand high mechanical loading and is spade resistant. ■ Precast concrete planters can be installed with Elastodrain as the base. ■ Complies with German National Standards DIN 18 195 and 4095. ■ Resistant to oil and bitumen. ■ Reduces transmission of noise and vibration. ■ Easy and quick to install – simply butt-jointed.

Alumasc Technical Helpline 01744 648400

51


Floradrain® FD 25-E Application Details Abutment Detail

approx 500mm

At upstands the waterproofing must be taken up 150mm above the finished surface of the roof – 100mm if the pitch is above 5%.

Minimum 150mm

The waterproofing should be mechanically fixed back with a termination bar, preferably with a counter flashing. The counter flashing should also protect the root barrier, moisture retention mat and filter sheet from UV.

Fig 34:

Roof Perimeter There should be a minimum 100mm upstand at roof edges – approx 50mm if the slope is 5º or more. The roof edging should have a coping with the slope to the inside of the roof. The root barrier, moisture retention mat and filter sheet should be taken above the water bearing level and be protected from UV, for example by an angle as shown.

approx 100mm

Fig 35:

Facade Drainage

200mm

At the base of facades, more water drains down than is often realised and a linear grille is recommended.

minimum 50mm

The use of the terrace linear grille, FR-HK, enables the use of a fillet to angle the roof waterproofing in the normal way. The height of the grating can be adjusted from 65 to 115mm. The base units incorporate slots to allow the water to drain through the drainage layer. Below paving, the Floradrain® is infilled with Zincolit to increase the compression resistance of the drainage layer. Fig 36: 52

Alumasc Technical Helpline 01744 648400


Eaves Details The use of retaining trims helps to solve a number of problems that occur at the eaves. Slots in the vertical face of the trim allow water from the drainage layer of the green roof to drain into the eaves gutter. The base section of the trim has a series of holes. It is secured in place by bonding a strip of waterproofing material through the holes to the main roof waterproofing below. The vertical arm of the trim is designed to hold concrete edging blocks in place, providing a neat and secure edge to the roof. The trim is also designed to hold pebbles in place. The filter sheet should be carried under the pebbles and turned up at the edge trim to prevent a build-up of silt in the drainage layer.

Fig 37:

Fig 38:

Inspection Chamber When roof outlets are located in planted areas it is necessary to provide an inspection chamber to allow access to the roof drain outlet for inspection and cleaning. Alumasc supplies inspection chambers in various depths to suit the depth of the build-up. The inspection chamber is surrounded by at least a 300mm wide strip of washed gravel to prevent strong plant growth in this area and enable any surface water to drain off. Fig 39: Alumasc Technical Helpline 01744 648400

53


Floraset FS 50 Application Details Abutment Detail

approx 300mm

At upstands the waterproofing must be taken up 150mm above the finished surface of the roof – 100mm if the pitch is above 5%.

Minimum 150mm

The waterproofing should be mechanically fixed back with a termination bar, preferably with a counter flashing. The counter flashing should also protect the root barrier, moisture retention mat and filter sheet from UV.

Fig 40:

Roof Perimeter There should be a minimum 100mm upstand at roof edges – approx 50mm if the slope is 5º or more. The roof edging should have a coping with the slope to the inside of the roof. The root barrier, moisture retention mat and filter sheet should be taken above the water bearing level and be protected from UV, for example by an angle as shown.

approx 100mm

Fig 41:

Facade Drainage

200mm

At the base of facades, more water drains down than is often realised and a linear grille is recommended.

minimum 50mm

The use of the terrace linear grille, FR-HK, enables the use of a fillet to angle the roof waterproofing in the normal way. The height of the grating can be adjusted from 65 to 115mm. The base units incorporate slots to allow the water to drain through the drainage layer. Below paving, the Floraset is infilled with Zincolit to increase the compression resistance of the drainage layer. Fig 42: 54

Alumasc Technical Helpline 01744 648400


Eaves Details The use of retaining trims helps to solve a number of problems that occur at the eaves. Slots in the vertical face of the trim allow water from the drainage layer of the green roof to drain into the eaves gutter. The base section of the trim has a series of holes. It is secured in place by bonding a strip of waterproofing material through the holes to the main roof waterproofing below. The vertical arm of the trim is designed to hold concrete edging blocks in place, providing a neat and secure edge to the roof. The trim is also designed to hold pebbles in place. The filter sheet should be carried under the pebbles and turned up at the edge trim to prevent a build-up of silt in the drainage layer.

Fig 43:

Fig 44:

Inspection Chamber When roof outlets are located in planted areas it is necessary to provide an inspection chamber to allow access to the roof drain outlet for inspection and cleaning. Alumasc supplies inspection chambers in various depths to suit the depth of the build-up. The inspection chamber is surrounded by at least a 300mm wide strip of washed gravel to prevent strong plant growth in this area and enable any surface water to drain off. Fig 45: Alumasc Technical Helpline 01744 648400

55


Sloping Roofs Application Details Eaves Detail The stop rail is raised above the level of the waterproofing membrane, by brackets, to allow water to run off the roof and into the gutter. The stop rail prevents the Floraset units from sliding down the roof. A filter sheet is fixed to the back of the stop rail and below the washed gravel to prevent fines from being washed down and blocking the drainage slot. The planting and substrate is stopped short of the eaves and replace by washed gravel or Zincolit to prevent strong plant growth in this area.

Fig 46:

Verge Detail The waterproofing membrane and the moisture mat are both turned up at the verge and protected by a capping trim. The planting and substrate is stopped short of the verge and replace by washed gravel or Zincolit to prevent strong plant growth in this area.

Fig 47:

Slopes over 20ยบ Where the roof slope is 20ยบ or more, shearing protection is necessary. This is achieved by introducing intermediate cross battens, as shown, to deal with the shear forces. The spacing of the battens depends on the roof slope: 20ยบ slope, battens at 10m centres 25ยบ slope, battens at 8m centres 30ยบ slope, battens at 5m centres.

Fig 48: 56

Alumasc Technical Helpline 01744 648400


Metal Roof Application Details Typical Section Detail Floradrain drainage layers are supplied pre-cut to suit the standing seam module. The filter sheet, installed above, ensures that fines do not block the drainage holes. ZinCo growing medium (50 to 70mm) is then installed before planting (eg, sedum, herb).

Fig 49:

Verge Detail Form the verge detail using standard Armaseam速 components - verge channel, verge clip and verge tolerance section. A neoprene membrane can be installed for additional weatherproofing before fixing the verge fascia. The planting and ZinCo growing medium is stopped short of the verge and is replaced by washed gravel to prevent strong plant growth in this area.

Ridge Detail

Fig 50:

For pitched roofs, turn up the sheet ends and install Armaseam速 ridge foam fillers, dams and zed supports, before securing the ridge flashing. The planting and ZinCo growing medium is stopped short of the apex and is replaced by washed gravel to prevent strong plant growth in this area. The fixed point arrangement must accommodate all inplane forces. Consult AEBP Ltd Technical Department for further assistance.

Eaves Detail

Fig 51:

Turn down Armaseam速 sheet and fix the eaves drip angle. The planting and ZinCo growing medium is stopped short of the eaves and is replaced by washed gravel. Secure the eaves retaining angle to the Armaseam速 seam clip, preventing gravel from entering the gutter, yet permitting the drainage of any rainwater. Choose from the extensive Alumasc gutter and rainwater pipe ranges for the drainage of excess rainwater and from the Alumasc Skyline range of fascia and soffit for aesthetic appeal. Floradrain drainage layers are supplied pre-cut to suit the standing seam module. The filter sheet, installed above, ensures that fines do not block the drainage holes. ZinCo growing medium (50 to 70mm) is then installed before planting (eg, sedum, herb). Fig 52:

Alumasc Technical Helpline 01744 648400

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Floradrain速 FD 40-E Application Details Paving Edge Detail Paved areas can easily be combined with planted areas. Built on the continuous base and drainage layers, the paving can be bedded onto Zincolit, crushed gravel or sand. Kerbs of treated timber, precast concrete or brick pavers provide a simple border between the hard and soft landscaping.

Fig 53:

Threshold Detail Providing a 150mm upstand beneath door thresholds is often difficult to achieve. The installation of a ZinCo drainage channel can solve the problem and permits an upstand of only 50mm. The channel collects the water run off and directs it into the drainage layer. Below paving, the Floradrain速 is infilled with Zincolit to increase the compression resistance of the drainage layer.

At the junction of the paving and planting, a kerb is haunched up with mortar laid directly on the Floradrain速. The Floradrain速 allows water to drain below it. The filter sheet SF in the planting area should be turned up at the kerb to prevent grit from washing down and obstructing the drainage below.

min 50mm

Fig 54: 58

Alumasc Technical Helpline 01744 648400


Terrace Drainage When roof outlets are located in paved areas, a terrace grating is available that allows access to the roof drain outlet. The dimensions correspond to those of terrace slabs: 200 x 400mm, 400 x 400mm, 500 x 500mm. This ensures excellent drainage from the surface as well as through the drainage layer. The grating is height adjustable from 60 to 90mm high. The height adjustment is easily carried out with a screwdriver.

Fig 55:

approx 500mm 150m minim

Rooflight Junction A 500mm wide safety area is recommended around rooflights to enable inspection and provide a fire break. The detail shows the green roof built over a warm roof construction.

Fig 56:

Alumasc Technical Helpline 01744 648400

59


Floradrain速 FD 60 Application Details Roof Dam With intensive planting it is necessary to conserve as much rainwater as possible for plant use, thereby keeping additional watering to a minimum. The channel system on the underside of the Floradrain速 FD 60 is capable of retaining 40mm of water. This can be used by installing roof dams over the roof outlets. Inspection chambers allow access for cleaning purposes and enable the roof dam coverings to be removed in winter. Fig 57:

Tree Anchorage All trees on roofs should be anchored down to prevent wind damage. Tree anchorage fixings through the waterproofing layer are to be avoided. A solution is to use a galvanised reinforcing mat below the tree root ball. This spreads the forces from strong winds over a wide area, minimising the risk of uprooting the tree. An alternative is to place paving slabs with eye bolt fixings laid directly over the drainage layer. Trees prone to wind damage should not be used on roofs. Fig 58:

Landscape Options Floradrain速 FD 60 can support the loading of the most intensive landscaped roof garden. Bushes and small trees are possible with a deeper layer of substrate. Floradrain 速 FD 60 is also suitable for hard landscaped areas, including pathways, terraces, play areas and even vehicle access. Where firm foundations are required for dwarf walls and balustrades, for example, concrete can be placed directly on top of the drainage layer without interrupting the flow of drainage water below. Fig 59: 60

Alumasc Technical Helpline 01744 648400


Road Surface Bordered by Planted Area The Floradrain速 FD 60 units can be used as permanent shuttering and still allow drainage water to flow through the voids formed under them. This enables concrete sub-bases for road constructions, and foundations for constructions such as balustrading, pergolas etc, without damaging the roof covering. There are numerous possibilities. The example shows a road formed of block paving.

Table 20: Concrete thickness for various loadings Imposed load (tons)

Concrete cover (mm)

Reinforcement 500/550 (bottom layer)

HGV 60

70

Q257

HGV 45

70

Q221

HGV 30

70 60

Q221 Q257

Lorry 16

70 60

Q221 Q257

Lorry 9

60

Q221

Lorry 6

60 50

Q221 Q257

Lorry 3

50

Q131

Fig 60:

Alumasc Technical Helpline 01744 648400

61


Elastodrain EL 200 and EL 202

Fig 61:

Fig 62:

Fig 63:

Fig 64:

Directly Laid Vehicular Paving

Build-up for Heavy Trucks

Access Road for Supply Vehicles

Car Parking

Elastodrain EL 202 is excellent at withstanding heavy loads and dynamic forces, making it suitable for use under roadways.

An alternative build-up where block paving is used for the road finish.

The concrete slab may be replaced by compacted gravel, where less heavy vehicles are expected.

Elastodrain mats have a high positional stability after installation.

The mats have rebated joints, ensuring excellent protection at the mat edges.

Proprietary concrete block may be used to enable planting to grow through the spaces between the concrete.

Infiltration water passes through the roadway build-up and is drained away through the Elastodrain layer.

Paving Details Elastodrain EL 202 enables all hard landscaping ideas to be realised. Send your project ideas to Alumasc Technical Services and we will provide a green roof solution for you. Edge trim

Block paving

Surface drainage

Perimeter detail Facade drainage

Fig 65:

62

Alumasc Technical Helpline 01744 648400


Wall Abutment approx 300â&#x20AC;&#x201C;500mm

The flexible Elastodrain mat can be extended up the sides of the perimeter wall and sealed with a suitable wall flashing. The top of the flashing should be 150mm above the surface of the paving slab.

min 150mm

The paving slabs may be laid on a strip of washed gravel, ensuring any heavy rainfall onto the wall above will quickly run into the drainage layer. The paved area also makes inspection access easier.

Fig 66:

Edge of Underground Car Park A deep layer of substrate can be built up at the edge of a loadbearing underground car park deck as shown. Substrate soils can be spread by means of wheel-loaders. This design is also suitable for pathways, terraced areas, play areas and even vehicle surfaces such as a fire station entrance.

Fig 67:

Ponds and Pools With the correct design, pools and ponds can be installed on roof decks. The pool lining should be installed on a sand bed over the Elastodrain. Should the pool ever leak, the water can safely drain away, via the Elastodrain. It is recommended to have at least 300mm depth of water to compensate for the higher evaporation rate on high and exposed buildings. Fig 68: Alumasc Technical Helpline 01744 648400

63


Product Data Roof Garden substrate intensive

Substrates

Supply

1m3 or 25 litre bag

Weight when wet

1400kg/m3

Weight when dry

950kg/m3

Settlement factor Typical pH value

+30% 7.8

Filter Sheet PV An extra heavy duty filter sheet for use over Elastodrain EL202 on driveways etc. Material

Supply

Supply

1m3 or 25 litre bag

Weight when wet

1400kg/m3

Weight when dry

1250kg/m3

Particle size

4-15mm

Settlement factor

+8%

Typical pH value

8.9

1200kg/m3

Weight when dry

700kg/m3

Settlement factor

+30%

Typical pH value

Zincolit recycled crushed brick

1m3 or 25 litre bag

Weight when wet

4.4

0.35kg/m2

Mass Roll Size Installation

Cranberry Bog substrate intensive

Polypropylene polyethylene 2.25m x 50m Loose laid with 150mm laps

Drainage Layers Floradrain® forms a continuous drainage layer under any type of landscape, allows water to drain in any direction and retains water for plant use.

Notes: Add settlement factor to calculated volume. All wet and dry weights are approximate and after settlement. Substrates other than those supplied by Alumasc must be approved for use in a green roof application.

Floradrain® FD 25-E

Filter Sheets

For shallow 50–100mm soil depths on extensive roofs to falls of at least 1:60. Material Thickness

Sedum Carpet substrate extensive Supply

Size

1m3 or 25 litre bag

Weight when wet

1250kg/m3

Mass (empty) Mass (full)

Weight when dry

1000kg/m3

Capacity

Settlement factor

+12%

Typical pH value

Installation

7.9

Recycled polyethylene 25mm 1m x 2m sheets and in 1m x 15m rolls with or without a filter lining 1.7kg/m2 4.7kg/m2 3 litres/m2 Loose laid and butt jointed

Filter Sheet SF Rockery Type substrate extensive Supply

1m3 or 25 litre bag

Weight when wet

1350kg/m3

Weight when dry

1000kg/m3

Settlement factor

+20%

Typical pH value

1m3

or 25 litre bag

Weight when wet

1350kg/m3

Weight when dry

950kg/m3

Settlement factor

+25%

Typical pH value

Material Mass Roll size Installation

7.8

Heather with Lavender substrate - semi-intensive Supply

A standard filter sheet for use with Floradrain® elements. 0.1kg/m2 2m x 100m Loose laid over the drainage layer with 150mm laps

Filter Sheet TG

Fixodrain XD20

A filter sheet specifically for use over Elastodrain EL 200/EL 202 when laid nipple up.

7.8

Alumasc Technical Helpline 01744 648400

Economic combined drainage, water retention and protection mat. Material

Material Mass

64

Polypropylene

Polypropylene and polyethylene 0.19kg/m2

Roll size 2.25m x 100m

1.12m x 100m

Installation

Loose laid with 150mm laps

Thickness

polypropylene 20mm

Size

1m x 20m

Mass (empty) Mass (full)

1.0kg/m2 4.0kg/m2

Capacity Installation

3 litres/m2 Interlocking long edges


Floradrain® FD 40-E

Floraset FS 50 and FS 75

Elastodrain EL 200/EL 202

For roofs with falls of at least 1:60 and complex extensive or semi-intensive landscaping.

Floraset FS 50 is for use on existing roofs with inadequate falls to overcome localised areas of ponding water.

Rubber drainage mats with large studs on one side. For use directly under vehicular and pedestrian paving and on large intensive roofs where irrigation is to be provided. Loose laid over slip membrane, studded side up.

Material

Recycled toughened polyethylene

Thickness

40mm

Size

1m x 2m sheets and 1m x 15m rolls with intergral filter

Mass

2.2kg/m2 empty 6.2kg/m2 full 4 litres/m2

Capacity Installation

Loose laid and butt jointed

Floraset FS 75 is for use on sloping roofs up to 25º. Deep substrate retaining profile prevents slippage. Material

Recycled expanded polystyrene

Board size

1m x 1m x 50/75mm high 2/3 litres/m2

Capacity Installation

Thickness

1.5kg/m2

Mass

Material

Loose laid and interlocked boards must be laid correct side up – this varies depending on whether the roof is flat or pitched, the deeper profile is always upwards on pitched roofs

EL 200

EL 202

Recycled rubber

Rubber

20mm

19mm

Weight

14kg/m2

18kg/m2

Studs

600/m2

1200/m2

>1000kN/m2

>1000kN/m2

Compressive strength Size Installation

1m x 1m

1m x 1m

laid loose butt jointed

laid loose butt jointed

Floradrain® FD 60 For roofs with or without falls which may incorporate high loads and dwarf walls. Can be used as permanent shuttering for further constructions or vehicle surfaces. Material

Recycled toughened polyethylene

Thickness

60mm

Board size

2m x 1m

Mass

Capacity Installation

2.3kg/m2 empty 40.7kg/m2 full & infilled with Zincolit 5 litres/m2 Loose laid and butt joints and stapled

Stabilodrain SD30

Floratherm® WD 65-H, WD 120-H and WD 180-H For increased thermal insulation, profiled to store water. Generally used on existing roofs. Material

Recycled polystyrene

Board size Type

1m x 1m Thickness (mm)

Mass (kg/m2)

‘R’ value (m2K/W)

WD 65-H

65

1.1

1.0

WD 120-H

120

2.1

2.4

WD 180-H

180

2.1

1.7

Extremely stable drainage element for use over underground car park decks under vegetation, walkways and driveways. Material

Rigid thermoformed polystyrene

Thickness

32mm

Board Size

2000 x 940mm

Mass

3kg/m2 dry 10.5kg/m2 full

Capacity Installation

7.5 litres/m2 Loose laid and butt jointed

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Product Data Root Barriers, Protection Layers, Moisture Mats and Slip Sheets

SSM 45 Moisture Retention and Protection Mat Material Water retention capacity Thickness

Fibre mat with polypropylene carrier 5 litres/m2 5mm

Roll size

2m x 50m

Mass (dry) Mass (wet)

0.47kg/m2 5.47kg/m2

Installation

Loose laid with 100mm laps

TSM 32 Moisture Retention and Protection Mat Material

WSF40 Root Barrier for extensive green roofs. Material Thickness Roll size

Mass Installation

Water retention capacity

Electronically tested polyethylene

Thickness

0.4mm 2m x 50m 6.25m x 20m 3m x 33.3m 2m x 50m

Thickness

3mm

Roll size

2m x 50m

Mass (dry) Mass (wet)

0.32kg/m2 3.32kg/m2

Installation

Loose laid with 100mm laps

ISM 50 Moisture Retention and Protection Mat

WSB80-PO Root Barrier for intensive green roofs Material

3 litres/m2

Material

Flexible polyolefin

Water retention capacity

1mm

Thickness

Mass (dry)

1.2kg/m2

Roll size

2m x 25m

Installation

Loose laid with 100mm hot air welded laps.

Mass (dry) Mass (wet)

0.85kg/m2 4.85kg/m2

Installation

Loose laid with 100mm laps

Material

Water retention capacity

BSM 64 Moisture Retention and Protection Mat

66

Recycled polypropylene rot proof fibres fixed to needle punched carrier 7 litres/m2 7mm

Roll size

2m x 25m

Mass (dry) Mass (wet)

0.68kg/m2 7.68kg/m2

Installation

Loose laid with 100mm laps

0.2mm 8m x 25m 3m x 33.5m 1.9kg/m2

Mass Installation

Loose laid with 200mm laps

TGV21 Air permeable separating and slip layer Material

Polypropylene

Alumasc Technical Helpline 01744 648400

Thickness Roll size

Roll size

0.55mm 1.6m x 50m 1.6m x 250m 0.8kg/m2

Mass Installation

Loose laid with 100m overlaps

6mm

WSM150 Moisture Retention and Protection mat

Thickness

Roll size

4 litres/m2

2m x 20m

Water retention capacity

Polyethylene

Thickness

Fibre mat with polypropylene and rubber, reinforced for spade resistance

Roll size

Material

Material

Thickness

3.8kg/m2 Loose laid with 1.5m laps to prevent penetration by lateral roots

Non rotting synthetic polyester fibre, for use under hard landscapes and extensive soils

TGF20 Separating and Slip layer

Needled fleece of recycled synthetic fibres for water retention on pitched roofs 12 litres/m2 20mm 1m x 15m

Mass (dry)

1.5kg/m2

Mass (wet)

13.5kg/m2

Installation

Loose laid and butt jointed

JEG Anti Erosion Net Material

Heavy, wide mesh jute fibre for binding new substrate surface on sloping areas – 100% bio-degradable

Roll size

1.22m x 70m

Mass

43kg per roll

Installation

Secure with wooden pegs on slopes ≥10º – overlap by 200mm


Inspection Chambers, Terrace Gratings and Roof Dams Inspection chambers For access to roof outlets. Chambers have varying heights to suit different substrate depths.

Type

For substrate depth

Material

Size

KS5

50mm

Black plastic coated steel

250 x 250 x 50mm high with 500 x 500mm flange attached for stability and to lap filter sheet

KS8

80mm

Black plastic coated steel

250 x 250 x 80mm high with 500 x 500mm flange attached for stability and to lap filter sheet

KS12

120mm

Black plastic coated steel

250 x 250 x 120mm high with 500 x 500mm flange attached for stability and to lap filter sheet

KS15

150mm

Aluminium

250 x 250mm on 320 x 320 x 150mm polystyrene support base

KS25

250mm

Aluminium

250 x 250mm on 320 x 320 x 150mm polystyrene support base

KS30 PE

300mm

Recycled polyethylene

300 x 300 x 300mm high

KS30 E

300mm

Stainless steel

300 x 300 x 300mm high

KS52

500mm

Recycled polyethylene

400 x 500 x 520mm high

Note: extension pieces for all inspection chambers available to order.

Terrace Grill-TR-H

Roof Dam

Adjustable height square grill units of different sizes for use in paving systems.

For fixing over roof outlets to retain water on roofs.

Material Height Unit size

Installation

Steel

Material

65-95mm or 95-125mm 200 x 400mm 400 x 400mm and 500 x 500mm Placed over Floradrain速 layer and adjusted to level of paving

Size

Drainage Channel

Copper to suit built-up roofing materials or PVC to suit single-ply PVC membranes 90mm x 40mm high with 400mm dia connecting membrane

A two piece unit which is not height adjustable, for use in proximity to facades. Drainage channels comprise a removable grill set in a U-frame casing perforated along its base length. Material

Galvanised steel or stainless steel

Lengths

Stainless steel 1m Galvanised steel, 500mm, 1m, 2m, and 3m

Accessories

Internal and external corners

Terrace Linear Grating Adjustable height linear units for use against facade abutments in paving.

Alumasc Technical Helpline 01744 648400

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Product Data Automatic Irrigation Units

Fall Prevention /Arrest Systems

Automated water top-up mechanisms for maintaining predetermined water levels, for use on roofs without falls. Used in conjunction with outlets fitted with roof dams.

Kerbs Concrete kerbs for retaining soil at junctions with paved areas and changes in level or material. Kerb size

500mm long x 300mm x 250mm

Installation

Laid on a sub-base of Zincolit laid over Floradrain速, installed either way around for kerb height of 250mm or 300mm

Accessories

Internal and (480 x 480mm) and external (230 x 230mm) corner junctions available in both 250mm and 300mm heights

Ballast Retaining Trims

Non-membrane penetrating anchor system for green roof maintenance access.

Type B 32 Can be situated at any position on the roof. Must not be situated directly over outlets. Base

300 x 300mm

Height

300mm

Weight

7kg

Type B 52 Can be situated at any position on the roof, directly over outlets if desired. Base

A range of aluminium upstands, perforated to allow drainage, available in a variety of heights to suit variable substrate depth. Polyester powder coated colour finishes or stainless steel versions available to order. Material

400 x 500mm

Height

500mm

Weight

18kg

Note: these units must be connected to a water supply in accordance with current water by-laws.

Fallnet SR Interlocking grid with centralised stainless steel anchor point. For use by one person.

Aluminium or stainless steel

Height

55mm, 80mm, 120mm, 140mm (other sizes to order).

Length

3m

Fallnet SR Rail Linear device employing a runner attachment, for use generally in restricted areas. For use by one person per length.

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Alumasc Technical Helpline 01744 648400


Handrail System

Plug Plants

Handrail baseplates

Floratop FT50

Bespoke handrail system, with integral baseplates for green roofs intended for frequent access.

A variety of 110cm3 rootball plug plants specifically selected for either extensive or semi-intensive green roofs, supplied in trays of 50 plants each.

Fallnet SK Reinforced plastic netting for use with ZinCo green roofs only) Variable in shape and size, for multiple users.

Fallnet SE 4m x 4m Stainless steel wire mesh with integral polyester fleece. For use by a maximum of two people.

For use with proprietary handrail systems of clientâ&#x20AC;&#x2122;s choosing.

Floratop FT 4 x 15 A variety of 75cm3 rootball plug plants specifically selected for either extensive or semi-intensive green roofs, supplied in packs of 4 trays of 15 plants each.

Solar Panel SB200 support system

Combined baseplate/support systems for solar panels and photovoltaic panels

Floratop FT100 Fallnet Harness Personal harness with adjustable lanyard, for use with any Fallnet system.

A variety of 50cm3 rootball plug plants specifically selected for extensive green roofs, supplied in trays of 100 plants each.

Alumasc Technical Helpline 01744 648400

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Product Data Semi-intensive Seed Mixes

Sedum Mats Precultivated sedum mats for extensive green roof applications, containing between 4 and 8 varieties, supplied in 2m2 mats for instant 100% coverage. Must be installed and watered thoroughly immediately upon delivery. Weight Thickness

25-30kg/m2 30-40mm

Sedum Cuttings

‘Country Colours’ A mixture of over 25 species, supplied in bags of 0.5, 1.0, 2.0 and 5.0kg, and applied at a rate of 25gm/m2.

‘Meadow Scent’ A blend of 8 grass species supplied premixed at a ratio of 60:40 with the ‘Country Colours’ seed mix (see above), applied at a rate of 25 gm/m2.

Fertilisers Sedum Shoot Mix A mixture of a minimum of 4 varieties of sedum species for application at 6080 gm/m2 (approx 100 cuttings), supplied in 2kg bags. Also available in 2kg bags of selected individual species.

Plantfit® 4M Slow release fertiliser for extensive green roofs, for application once per year at 25 gm/m2, ideally between March and June, supplied in 2.5, 10 and 25kg bags.

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Alumasc Technical Helpline 01744 648400


Alumasc Premium Products - All Brands Alumasc provides an unrivalled range of premium products for building exteriors and drainage, along with high levels of technical expertise and project support. Our wealth of experience combined with networks of approved installers, merchant stockists and a choice of warranty options ensures we provide appropriate product and system solutions for all types of buildings.

Alumasc is the UK’s leading manufacturer of aluminium rainwater systems and offers a complete range of gutters, downpipes and fascia/soffits for both contemporary and traditional architecture. Alumasc’s cast iron rainwater system is for historic and restoration sites, with bespoke designs available to match or replace existing installations.

Alumasc’s Harmer brand provides market leading solutions for rainwater handling and building drainage. Aluminium roof, floor and shower drains are complemented by specialist drainage ranges in plastic. A choice of cast iron pipework systems is available for internal and rainwater drainage. Specialist rainwater management systems and paving and deck supports are also available. Alumasc is a specialist provider of world class waterproofing and green roof systems. The range includes Derbigum high performance flat roof membranes, Firestone TPO and EPDM single ply membranes, Hydrotech structural waterproofing and ZinCo Extensive, Biodiverse, Semi-intensive and Intensive green roofs.

Alumasc is a specialist in the design and development of thermally efficient insulated render systems. Alumasc’s external wall insulation systems are available with a choice of insulating material and silicone, mineral or polymer-modified decorative render finishes.

Rainwater ■

Aluminium Rainwater Systems

Aluminium Fascias, Soffits and Copings

Cast Iron Rainwater Systems

www.alumascrainwater.co.uk

Drainage ■

Roof, Floor and Shower Drains

Cast Iron Soil & Waste Systems

Rainwater Management Systems

Paving and Decking Supports

www.alumascdrainage.co.uk

Waterproofing ■

Flat Roof Membranes

Single Ply Membranes

Structural Waterproofing

Green Roof Systems

www.alumascwaterproofing.co.uk

Facades ■

External Wall Insulation

Render Only Systems

Brick Slips & Specialist Systems

Decorative Coatings

www.alumascfacades.co.uk

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premium products โ€ข proven solutions

ALUMASC EXTERIOR BUILDING PRODUCTS LTD White House Works, Bold Road, Sutton,

Rainwater

St Helens, Merseyside, WA9 4JG United Kingdom

Drainage Telephone: +44 (0)1744 648400

Waterproofing

Facsimile: +44 (0)1744 648401 Website: www.alumascgreenroofs.co.uk

Faรงades

E-mail: info@alumasc-exteriors.co.uk

Product and technical literature hotline

0808 100 2008 A unique fusion of premium products, technical expertise and product support All reasonable care has been taken in the preparation of this brochure, all information, recommendations and guidance notes on the use of The Products are made without guarantee since the conditions of use are beyond the control of Alumasc Exterior Building Products Limited (The Company). The customer is responsible for ensuring that each product is fit for its intended purpose and that conditions for use are suitable. The information contained in this brochure and advice arising therefrom is free of charge and accordingly on the terms that no liability nor liability for negligence will attach to The Company or its servants in relation to any such service arising out of or in connection with this brochure. The Company pursues a policy of constant product development and information contained in this publication is therefore subject to change without notice.

72 0910/2K

Alumasc Technical Helpline 01744 648400


Alumasc Exteriors - Zinco Green Roofs