A rooftop garden or additional outside living space are the top reasons people choose flat roofs.
Flat green roof drainage.
Please contact our technical department on 01403 210204 or submit an enquiry for more information.
The build up of a flat green roof will vary depending upon the intended use.
Secondary overflow drains are located at a higher point on the roof.
Poor drainage can lead to serious issues with flat roofing from leaks to structural damage.
For flat or nearly flat roofs primary drains are located at the lowest point of the roof.
The bottom edge lies flat against the roof to prevent rooftop penetration.
The one challenge with flat roofing is ensuring proper drainage.
Unlike other roofing types that are slanted or sloped to allow water to drain automatically flat roofs need a built in drainage system to help remove moisture and debris.
Flow of water into them is promoted by positive drainage.
Type of flat roof drainage each drainage low point roof sub area is allocated a roof drain and an overflow drain.
A standard roofing membrane and insulation layer is laid onto the underlying roof structure then a studded perforated drainage membrane such as oldroyd xv 20 greenxtra is used in addition to provide a drainage layer.
The most critical of these issues is the flat roof drainage systems.
Zurn offers a variety of roof drain solutions suited for modular green roofs such as the z163 and the 84 options both shown below.
For a large roof it is recommended to have drains placed at multiple locations within the area of the roof.
Modular green roofs are installed differently than layered green roofs requiring a different style of roof drain.
There are several drainage options to repair pooling or ponding water on flat roofs including internal drains gutters and downspouts scuppers and roof leveling compounds.
The drainage system of any roof can be located at the edge or in the middle of the roof.
The need for flat roof drainage in order to prevent water accumulation and moisture damage flat roofs need to be equipped with special drainage systems.
Grs drainage conduit is constructed from 80 recycled 16 gauge stainless steel.
A green roof may require a separately plumbed secondary drainage system also known as the overflow relief system.
Increasing the angle of a flat roof will always increase the speed of water movement across the surface.
The channel is designed to be laid end to end and terminates either in the ballasted unplanted roof area or adjacent to the grs inspection chamber covered roof drain.
The greenslope roof ponding repair kit provides a lightweight inexpensive solution to flat roof ponding.
Ponding water on flat roofs reduces the roof s lifespan.
