Protecto-drain 20 is a 1mm thick HDPE membrane which gives it a higher level of puncture resistance and compression strength, which is useful for areas which have a higher level of traffic. The larger cup size of 20mm a larger amount of ground water to pass along the membrane.

It is ideal as a lining membrane on bridges and in tunnels, where the flexible and easy-to-bond nature of the material makes it easy to install, and it can cope with larger quantities of ground water and drainage quite easily. The membrane will also not pollute the water running off in any way, which means that water can be directed, managed and recycled for a whole manner of uses. Such matters should be borne in mind by designers and specifiers when considering things such as public sector infrastructure projects and methodologies such as BREEAM. We consider Protecto-drain to be the best way to manage water beneath the ground.

It is used extensively in horizontal installations beneath the initial concrete slab layers, where it is effective in preventing seepage water from below entering the foundations.

Each individual sheet can be bonded together by overlapping the cups and sealing with tape, meaning the layer is completely waterproof. Since it is flexible, any undulations and imperfections in the ground below can be accommodated with risk to the seal. Rebar can be laid directly onto the membrane without damage and concrete can be poured

It is an easy, fast way to seal building envelopes on new build.

In vertical applications it is very good as a waterproofing and protection layer between layers of concrete. Again, it is easy to install due to its flexible nature, and it can be bonded securely and watertight by overlapping the cups.

It is tough enough to tolerate a wet concrete pour without risk of damage. When installed between two layers of concrete its cupped profile ensures a constant air gap between the two concrete layers, meaning the fabric of the building sealed at the sides, so there is not risk of damp creeping into the concrete even if the building is subterranean in part.

Protecto-drain 20 offers a much simpler, but often more effective way to manage and control subterranean water than many expensive systems and concepts. By sticking to simple principles of not stopping water but redirecting it, hydrostatic pressure points are prevented. By designing an “egg-box” profile, blockages are prevented and a greater amount of water can pass along the membrane. This profile also allows very easy sealing of the membrane, as multiple sheets can be “clipped into place” by overlapping the cups and sealing the joints with adhesive tape

Remember, if you are constructing at or below the ground surface, you will never prevent water ingress. Instead think how you might best channel that water away from the structure.

Technical Data