Flat Green Roof Drainage

Along with the benefits of a flat roof come unique challenges.

Flat green roof drainage.

These can be used on large flat roofs as well as residential. A function of the drain layer is the application of a root resistant filter fabric. For a large roof it is recommended to have drains placed at multiple locations within the area of the roof. 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.

It forms an extremely stable and pressure resistant sub base and sometimes serves as an additional thermal air layer. Having proper drainage on a green roof is a critical aspect of the system. A green roof may require a separately plumbed secondary drainage system also known as the overflow relief system. This roof ponding repair kit can be topcoated with all commonly used roof coatings to waterproof a flat roof.

Inner drains are located in central areas of the roof and are connected to pipes underneath the roof that drain the water to a sewer. Your building and location can help determine which drain will fit your roof needs. Dallmer products are available for flat roofs of solid or lightweight construction and with a single or double ply membrane. Greenslope is a roof leveling compound that helps eliminate water ponding areas and facilitate flat roof drainage.

The gr52 can withstand 0 352 gallons per square foot or 1 4 gallons per panel. The drainage system of any roof can be located at the edge or in the middle of the roof. There are a number of drainage options for flat roofs to combat ponding. Increasing the angle of a flat roof will always increase the speed of water movement across the surface.

The most critical of these issues is the flat roof drainage systems. The grs gr52 panel size is 24 x 24 x 2 125. Secondary overflow drains are located at a higher point on the roof. The drainage of flat roofs is essential to drain off rain water and to protect the roof against moisture damage and warping.

For flat or nearly flat roofs primary drains are located at the lowest point of the roof. The drainage layer is applied over the entire roof area. Green roof solutions gr32 and gr52 drainage panels come in 24 x 24 interlocking squares constructed of 100 recycled high density polypropylene hdpp. Zurn is proud to introduce its green roofing drain product line specifically suited for the unique needs of a green roof installation.

Poor drainage can lead to serious issues with flat roofing from leaks to structural damage. Roof leveling compounds.