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| Its specially designed cups collect water and channel it away from the surface towards an appropriate drainage system. It protects the membrane from abrasion or puncture damage, has high tearing resistance, and also helps to provide good ventilation to the building. |
| PROTECTO-DRAIN 8 |
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When Wallbarn Protecto-drain 8 is fitted to the foundation wall, it protects the membrane from being punctured during backfill as well as damage from settlement or ground salts.
The air gap prevents hydrostatic pressure building up and helps to ventilate the wall. The water simply runs down the outer surface towards the drain. Wallbarn Protectodrain 8 can also be fitted to floors to act as a vapour barrier and damp proof layer
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| PROTECTO-DRAIN G8 |
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| Further protection and drainage is achieved by using Wallbarn Protectodrain G8. This sheeting has a geotextile layer bonded to the outer side which filters out particles but allows the water to run through the fabric into the air gap.
This creates a drainage channel where the water can be directed to the drain or pipe. |
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| Protecto-drain G8 is ideal for tanking and planters as it protects the waterproofing from damage and also separates and filters rainwater from soil without causing erosion. |
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| The area is then backfilled with soil and planted up as a garden. The vegetation will not become waterlogged and the excess water can be directed and channeled properly into the drainage system, possibly for re-use on the gardens. |
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Effective drainage of block paving can also be achieved with Protecto-drain G8. The membrane is laid onto the podium deck above the waterproofing and beneath the block paving with the geotextile on the upper side, in exactly the same way as tanking. The blockwork is laid onto Protecto-drain G8 and the gaps filled with fine sand.
The cavity between the geotextile and the HDPE means that rainwater can escape downwards faster and none of the sand will be lost to erosion. Therefore more stable, puddle-free blockwork is created. |
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The membrane is easily shaped around corners and details such as drains and outlets in the planter.
These areas are where clogging is most likely to occur, so applicators can lift the geotextile away from the HDPE membrane in parts and wrap it around the outlet. The HDPE can then be laid down up to the pipe and cut around it. The air gap is maintained so water can pass through the geotextile. |
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| PROTECTO-DRAIN 20 |
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Wallbarn Protecto-drain 20 is a heavy duty drainage sheet which can be applied to areas where a far greater degree of puncture resistance, membrane protection and water drainage is required, such as bridges and subterranean tunnels.
The membrane is 1mm thick rather than 0.6mm, which gives it greater compression and puncture strength. It is useful for horizontal areas which are likely to have heavy traffic.
Typical installations included lining bridges and tunnels, foundation trenches for large buildings and areas beneath a concrete screed. |
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A cover profile can be fitted to the top edge of all types and thicknesses of Protecto-drain when it is installed on a vertical plane.
This ensures ventilation of the air gap and stops rainwater blowing in or particles becoming lodged behind the membrane. |
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| PROTECTO-DRAIN 20P FOR USE IN GREEN ROOFS |
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Green roofs are becoming increasingly popular and important for flat roof design in UK. They are now seen as a major part of how contractors build and present flat spaces.
Drainage sheeting is an important component in the complete green roof system |
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Wallbarn offers a variation on the traditional drainage sheet with its new Perforated range, specifically designed for green roof applications.
Used in green roof systems sandwiched between two layers of geotextile filter fleece, Protecto-drain 20P protects the waterproofing membrane from root ingress and point loading, and helps with the drainage of rainwater on roof gardens. |
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| Laid horizontally, the rainwater will work through the soil substrate and into the 20mm deep cups. These cups will hold approximately 5 litres of water per m2. The excess water will drain through the perforations between each cup and through the drainage channel out into the outlet. |
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| The water held in the cups can then be drawn back up through the filter layer to nourish the vegetation above. This means that a constant level of water can be held in the reservoir cups, but rainwater is efficiently removed effectively and quickly from the roof, which will not become overloaded. |
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It is important to remember, however, that these materials do not alone provide a drought resistant system. Regular watering and maintanance is required for all roof gardens and green roofs. |
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| PLEASE SEE OUR GREEN ROOF SECTION IN THE PRODUCT BROCHURE |
NEW PRODUCT – PROTECTO-DRAIN PLASTER GRADE
Drainage sheeting with a polypropylene mesh bonded one side to hold plaster rendering. This product is ideal for internal tanking projects such as basements.
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| Technical Data |
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Protecto-drain 8 |
Protecto-drain 8 lightweight |
Protecto-drain G8 |
Protecto-drain 20 |
Protecto-drain 20 P |
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| Material |
High Density Polyethylene (HDPE) |
| Colour |
Black |
| Sheet thickness (approx) |
0.60mm
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0.50mm |
0.60mm
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1mm |
1mm |
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| Density |
550gsm |
420gsm |
550gsm |
1,000gsm |
1,000gsm |
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| Compression |
250kN/m2 |
170kN/m2 |
250kN/m2 |
180kN/m2 |
180kN/m2 |
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| Length |
20m |
20m |
15m |
20m |
20m |
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| Width |
2m |
2m |
2m |
1.9m |
1.9m |
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| Cup height |
8mm |
8mm |
8mm |
20mm |
20mm |
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| Air volume between cups (approx. ) |
5.3 l/m2 |
5.3 l/m2 |
14 l/m2 |
14 l/m2 |
14 l/m2 |
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| Horizontal drainage capacity |
4.6 l/m2/s |
4.6 l/m2/s |
4.6 l/m2/s |
10 l/m2/s< |
10 l/m2/s |
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This data refers to green roofs with 5% maximum slope and mimimum height substrate of 75mm. Increased growing meduim and vegetation leads to slower drainage capacity |
| Water permeability |
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filter webbing 100 l/m2 |
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| Temperature stability |
-40°C to 80°C |
| Resistance to chemicals |
yes |
| Biological characteristics |
resistant to fungus and bacteria, rot-proof |
| Physiological characteristics |
not harmful to drinking water |
| Fire classification |
B2 according to DIN 4102 |
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To download our current brochure (in Adobe Acrobat PDF format) please click here.
Wallbarn Protecto-drain is high density
polyethylene (HDPE) cupped drainage sheeting which acts as a protection and drainage layer for waterproofed surfaces. |
