Green Roof Drainage Layer Material

Storm water management for sedum and wildflower green roofs.

Green roof drainage layer material.

On modern lightweight green roofs plastic drainage sheets or boards are the preferred drainage materials. 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. 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. Protection drainage and filtration.

A study conducted by coma et al. Root barrier the root barrier is the system that avoids the membrane underneath from being pierced and penetrated by roots ensuring that the system can remain. 2 the green roof with rubber crumbs reduced in 14 the. Grs extenduct is a 40 recycled drainage core in a waffle pattern with a geocomposite fabric bonded to the top side.

The filter layer separates the substrate layers growth media from the drainage layer below and captures the humic particles and organic materials from draining out leaving them for the plants. The design creates an open and continuous flow path even under high loads. Drainage protection filtration layer it is used for lightweight green roofs terraces and has many functions. 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.

Drainage layers are used to provide a roof drainage system when installing a green roof. Grs extenduct 2 includes an additional geocomposite fabric bonded to. Systems with drainage mats. Green roof solutions offers many different drainage layer options depending on system goals regarding water retention.

Buy green roof drainage systems from 9 50. Sedum supply have two types of drainage layer 12mm and 20mm. Bauder sdf drainage layer material of the drainage layer polyamide monofilament weight of the drainage layer 400 g m. 2016 shows that there were significant differences in energy savings when two identical extensive green roofs with different drainage layer materials one with 4 cm of pozzolana and the other one with 4 cm of recycled rubber crumbs were experimentally evaluated in both cooling and heating periods fig.

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 most critical role of the drainage layer is to provide an adequate flow of water off the roof during and after a rain event.