Green Roof Drainage Plan

Bauder sdf drainage layer material of the drainage layer polyamide monofilament weight of the drainage layer 400 g m.

Green roof drainage plan.

Green roof systems can be shallow typically referred to as extensive or deep typically referred to as intensive. As a rule of thumb a pitch under 10 degrees is normal for green roofs where a minimum fall of 1 60 can help encourage drainage. Drainage protection filtration layer it is used for lightweight green roofs terraces and has many functions. The systems are designed to ensure that stormwater can be used by plants for longer periods of time without oversaturation of the system.

A green roof may require a separately plumbed secondary drainage system also known as the overflow relief system. Your green roof design will depend on the roof your preferred green roof system as well as your desired build up and vegetation. A green roof may need to incorporate edge detailing around mechanical structures and should be. Protection drainage and filtration.

It is made of a filtration veil and the polyamide monofilament fibre network layer. Green roof design. The roof can often be the space where major building systems are specified including for mep. Flow of water into them is promoted by positive drainage.

A major advantage of green roofs is the reduction of storm water runoff which leads to a decrease of the burden on sewer systems by 50 90 in summer depending on the green roof design and local climate. The roof is likely to consist of an impermeable layer a susbstrate or growing medium and a drainage layer although not all green roofs require a drainage layer. Green roofs have influence on cost reduction due to low or no need for raincatching cisterns and similar equipment which is usually used for. The green roof design needs to accommodate adequate water retention suitable drainage structural loading and the depth of green roof growing substrate.

The design of the different drainage layers allows for a portion of the stormwater to be retained above where the water is allowed to flow freely off of the roof.