Green Roof Drainage Material

It forms an extremely stable and pressure resistant sub base and sometimes serves as an additional thermal air layer.

Green roof drainage material.

Systems with drainage mats. The drainage layercan be created using different lightweight aggregate materials such as gravel clay tiles and lava rock. An impermeable roof membrane and root barrier a drainage layer lightweight growth media and adapted vegetation see figure 1. On modern lightweight green roofs plastic drainage sheets or boards are the preferred drainage materials.

Green roof systems of this type are drained by a multi layer fabric mat called a drainage mat that combines soil separation drainage and protection functions. Compared with green roofs systems using drainage plates or granular drainage this system is the fastest to install and creates the thinnest and lightest green roof assembly. The general design of a green roof consists of four distinct layers. Protection drainage and filtration.

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. Xf drain green roof drains contain a minimum of 40 by weight of recycled polymer from post industrial sources. They can also provide additional functions for the green roof other than just drainage. The drainage layer is applied over the entire roof area.

It is made of a filtration veil and the polyamide monofilament fibre network layer. Some options also include a water retention fleece made of 100 recycled polymer fibers to capture and store water and manage storm water runoff. Bauder sdf drainage layer. Green roof drainage system xf 3111 drain water retention for semi intensive gd.

A function of the drain layer is the application of a root resistant filter fabric. The advantage of the latter is that water can be stored and used later by the plant. The gr52 can withstand 0 352 gallons per square foot or 1 4 gallons per panel. Green roof solutions gr32 and gr52 drainage panels come in 24 x 24 interlocking squares constructed of 100 recycled high density polypropylene hdpp.