Protecto-drain G8 is made from the same HDPE (high density polyethylene) material, but has a geotextile fabric bonded to one side. It is designed to protect vertical surfaces from damage with the laminated non-woven geotextile layer separating the soil from the membrane, giving greater protection to the subterranean waterproofed surface. It is also lightweight and simple to install.
The geotextile filters out particles but allows the water to run through the fabric and horizontally down through an 8mm air gap. A perforated pipe should be installed at the bottom of the vertical surface on a gradient, and Protecto-drain G8 wrapped around it so that the HDPE membrane is on the underside and the filter fleece is across the top. The channel should be covered with free draining gravel.
Since effective drainage can occur but the soil remains in place, the earth will not become eroded near the drainage areas. Therefore, common problems such as subsidence, waterlogging and rising damp are avoided.
For planters
Protecto-drain G8 is ideal for lining planters and vegetated areas.
The membrane is easily shaped around corners and details such as drainpipes and outlets without risk or breaking. These are the areas where clogging is most likely to occur, so applicators can lift the geotextile backing away easily from the membrane in order to wrap around outlet pipes, thus maintaining complete separation and preventing clogging.
The area can then be backfilled with soil and planted up. The vegetation will not become waterlogged and any excess water can be directed and channeled properly into the drainage system, for recycling if required.
For block paving
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 either suspended on Wallbarn support pads and laid onto Protecto-drain G8….
….or laid directly onto the membrane, butted together, 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.
When installing onto a vertical surface, Protecto-drain G8 can be fixed with bitumen tape….
….or by using nails and plugs with a cover profile secured at the top….
….while on a horizontal plane the membrane can be secured together with bitumen tape, ensuring a 20cm overlap.
Technical Data
| Technical features | Technical data | Test Method |
| Membrane material | High density polyethylene (HDPE) | |
| Filter material | Polypropylene geotextile (100gsm) | |
| Roll width | 2 metres | calibrated measuring tape |
| Roll length | 15 metres | calibrated measuring tape |
| Roll weight | 650 gsm (±10%) | calibrated thickness measuring tape |
| Rolls per pallet | 6 | |
| Height of cups | 8mm | MDV |
| Number of cups | 1500 pieces per m2 | MDV |
| Resistance to water penetration | W1 | EN 1928 |
| Compression strength | 250kN / m2 | MDV |
| Tensile strength MD | = 330 N / 50mm | EN 12311-2 |
| Tensile strength CMD | = 335 N / 50mm | EN 12311-2 |
| Elongation MD | = 28.7 N | EN 12311-2 |
| Elongation CMD | = 26.2 N | EN 12311-2 |
| Resistance to tearing MD | = 332 N | EN 12310-1 |
| Resistance to tearing CMD | = 349 N | EN 12310-1 |
| Resistance to static loading | No perforation at 200 N in 24 hrs | EN 12730 |
| Durability | waterproof / passed | EN 1296 & EN 13984 |
| Exposure to liquid chemicals | waterproof | EN 1847 |
| Air volume between the cups | 5.5 litres per m2 | MDV |
| Water drainage capacity | 4.6 litres per m2 | MDV |
| Temperature tolerance | - 30°C to + 80°C | MDV |
| Reaction to fire | B2 (B1 available by special request) | DIN 4102 |
| Physical characteristics | Rot-proof, resistant to fungus and bacteria. Will not leach chemicals. Not harmful to drinking water. No health hazards under normal use | |
Application
Used as a mechanical protection against soil and root movement along foundation walls. It can be installed with a 20cm overlap and fixed with nails and sealing buttons 5 cm from the top edges of the roll and 20cm from each roll. Edging profile is installed to prevent soil ingress into the cavity. Maximum build-up 8 metres high.
Laid horizontally and fixed using sealing tape in the overlapping areas the sheets protect concrete flooring form rising damp and keep reinforcement mesh in place firmly during the concrete works.
Storage and handling
Protect against prolonged exposure to direct sunlight and temperatures over 25 °C
Guarantee / warranty
When used in the correct manner and application, the material will be rot proof for 20 years. Wallbarn application rules and proper site storage, handling and installation practices must be carried out as a prerequisite for any possible future warranty claims.
Health and safety
No known dangerous substances
This datasheet represents the current knowledge of the product, but may be revised by Wallbarn in the future. It is the duty of the customer and installer to be clear that this product is suitable for the purposes it is used for.
This technical datasheet may be revised or changed at any time without prior notice. It is the duty of the customer and installer to be sure they possess the latest version of the datasheet.
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.