4-320 / Drainage membrane

*Single-ply dimpled membrane - an effective protection and drainage system for horizontal indoor applications*

**Certified according to CE standard EN 13967**

**Advantages:**

* The drainage membrane is an effective protection and drainage system for horizontal indoor applications
* The membrane consists of a high-quality HDPE dimpled sheet
* This flat dimpled sheet has been specially developed for flooring applications to protect against rising damp and contamination. Moreover, it can also be used as a substitute for lean concrete sub-bases
* The special low dimple shape (approx. 4 mm) minimises changes in floor level, while still providing a sufficient air gap to achieve vapour pressure compensation
* The drainage membrane is an affordable alternative to lean concrete sub-bases. Because the dimples securely separate the foundation wall from the ground, the dimpled sheet takes on the function of lean concrete. This makes it possible to work in any weather; the waiting time typical for the hardening of lean concrete is eliminated