Green Roof Drainage Material

They can also provide additional functions for the green roof other than just drainage.

Green roof drainage material.

The general design of a green roof consists of four distinct layers. The drainage layer is applied over the entire roof area. Some options also include a water retention fleece made of 100 recycled polymer fibers to capture and store water and manage storm water runoff. 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.

Protection drainage and filtration. Green roof drainage system xf 3111 drain water retention for semi intensive gd. It is made of a filtration veil and the polyamide monofilament fibre network layer. On modern lightweight green roofs plastic drainage sheets or boards are the preferred drainage materials.

A function of the drain layer is the application of a root resistant filter fabric. Systems with drainage mats. It forms an extremely stable and pressure resistant sub base and sometimes serves as an additional thermal air layer. 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.

The grs gr52 panel size is 24 x 24 x 2 125. Green roof solutions gr32 and gr52 drainage panels come in 24 x 24 interlocking squares constructed of 100 recycled high density polypropylene hdpp. 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. An impermeable roof membrane and root barrier a drainage layer lightweight growth media and adapted vegetation see figure 1.

The advantage of the latter is that water can be stored and used later by the plant. They can also be used to increase the size of the root growth zone and provide space for an aeration system. Bauder sdf drainage layer. Drainage protection filtration layer it is used for lightweight green roofs terraces and has many functions.