Green Roof Drainage Layer Material

Green roof solutions gr32 and gr52 drainage panels come in 24 x 24 interlocking squares constructed of 100 recycled high density polypropylene hdpp.

Green roof drainage layer material. It is made of a filtration veil and the polyamide monofilament fibre network layer. It is used for lightweight green roofs terraces and has many functions. The drainage layercan be created using different lightweight aggregate materials such as gravel clay tiles and lava rock. Protection drainage and filtration.

It is placed directly atop the drain layer for maximum long term success of the. The advantage of the latter is that water can be stored and used later by the plant. The green roof drainage layer thickness makes sure that nothing can go wrong below offering a solid and effective guard. The grs gr52 panel size is 24 x 24 x 2 125.

The gr52 can withstand 0 352 gallons per square foot or 1 4 gallons per panel. Also the green roof drainage layer material is made to be sturdy and strong so that piercing can be limited and that the integrity of the entire program can be retained with ease. Plastic drainage layers may be rigid open mesh structures that allow unrestricted drainage of water or they may have a cup style egg carton design that enables water to be stored at the base of the profile see image below. They can also provide additional functions for the green roof other than just drainage.

It forms an extremely stable and pressure resistant sub base and sometimes serves as an additional thermal air layer. A function of the drain layer is the application of a root resistant filter fabric. On modern lightweight green roofs plastic drainage sheets or boards are the preferred drainage materials.