Green Roof Drainage Plan

Z110 green roof drains are available with enclosure heights ranging from 5 to 18 or as specified.

Green roof drainage plan.

Drainage protection filtration layer it is used for lightweight green roofs terraces and has many functions. Intensive layered green roof intensive green roofs have a deeper soil depth therefore the roof drain enclosure height is typically 12 or more. Both of our permaseal 20p green roof and permaseal 8 green roof drainage membranes have a build in geotextile filter layer making the installation process that much quicker. For flat or nearly flat roofs primary drains are located at the lowest point of the roof.

Secondary overflow drains are located at a higher point on the roof. Dead and imposed loads should be calculated in accordance with bs en 1991 1 1 be en 1991 1 3 and bs en 1991 1 4 and should include the weight of the waterproofing system saturated weight of the green roof components and substrate vegetation snow loads and imposed loads such as access by people and vehicles as well as point loads for. The grs gr52 panel size is 24 x 24 x 2 125. Flow of water into them is promoted by positive drainage.

Green roof solutions gr32 and gr52 drainage panels come in 24 x 24 interlocking squares constructed of 100 recycled high density polypropylene hdpp. Urbanscape extensive inclined up to 20 and pitched green roof systems 20 45. The gr52 can withstand 0 352 gallons per square foot or 1 4 gallons per panel. Z110 green roof drain shown with 18 height for intensive green roofing applications.

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 are designed to intercept and retain precipitation reducing the volume of runoff and attenuating peak flows. A green roof may require a separately plumbed secondary drainage system also known as the overflow relief system. It is made of a filtration veil and the polyamide monofilament fibre network layer.

Protection drainage and filtration.