Green Roof Water Drainage

These elements have low retention capacity.

Green roof water drainage.

Water retention and drainage board. Vegetation that does not like anaerobic conditions can be killed off. Greenslope is a roof leveling compound that helps eliminate water ponding areas and facilitate flat roof drainage. However too much water on a roof can cause a number of serious issues.

Our flexible adaptable components can be configured to meet even the most challenging custom green roof specifications. How to drain the roof. They have to be mounted linked to each other and floating over the protective layer of the waterproofing. One of the main concerns that small scale builders have outlined to us is how to drain the roof.

Together they form the drainage layer of the extensive green roof. Drainage and water retention element. Benefits of green roof. This roof ponding repair kit can be topcoated with all commonly used roof coatings to waterproof a flat roof.

Allows rainwater to water vegetation in green roofs without waterlogging the plant xf is highly permeable geo composites that combine drainage filter aeration and water retention functions in one product. Green roof solutions offers many different drainage layer options depending on system goals regarding water retention. The most critical role of the drainage layer is to provide an adequate flow of water off the roof during and after rainfall. Sub surface run off must drain efficiently from the substrate into the drainage layer off the roof.

Figure 2 shows the daily rain and associated daily green roof runoff for 1993 in state college pa for a green roof having a maximum of 1 6 inches of water retention storage. A green roof may require a separately plumbed secondary drainage system also known as the overflow relief system. For flat or nearly flat roofs primary drains are located at the lowest point of the roof. Note that there was very little if any runoff during the may 1 to sept 30 growing season.

Good drainage is criticalfor green roofs and ensures that large amounts of water are not retained on the roof compromising both the structural integrity of the building and plant health through waterlogging and oxygen depleted substrates. Lack of water is one of the biggest stresses on a green roof. Flow of water into them is promoted by positive drainage. It can be used for light planted roofs.