Flat Green Roof Drainage

Having proper drainage on a green roof is a critical aspect of the system.

Flat green roof drainage.

The drainage layer is applied over the entire roof area. 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. A rooftop garden or additional outside living space are the top reasons people choose flat roofs. Roof leveling compounds.

Increasing the angle of a flat roof will always increase the speed of water movement across the surface. Your building and location can help determine which drain will fit your roof needs. This roof ponding repair kit can be topcoated with all commonly used roof coatings to waterproof a flat roof. The grs gr52 panel size is 24 x 24 x 2 125.

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. The most critical of these issues is the flat roof drainage systems. Along with the benefits of a flat roof come unique challenges. These can be used on large flat roofs as well as residential.

The gr52 can withstand 0 352 gallons per square foot or 1 4 gallons per panel. 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. It forms an extremely stable and pressure resistant sub base and sometimes serves as an additional thermal air layer.

The one challenge with flat roofing is ensuring proper drainage. The drainage system of any roof can be located at the edge or in the middle of the roof. For flat or nearly flat roofs primary drains are located at the lowest point of the roof. A green roof may require a separately plumbed secondary drainage system also known as the overflow relief system.

Secondary overflow drains are located at a higher point on the roof. A function of the drain layer is the application of a root resistant filter fabric. Poor drainage can lead to serious issues with flat roofing from leaks to structural damage. Dallmer products are available for flat roofs of solid or lightweight construction and with a single or double ply membrane.

The drainage of flat roofs is essential to drain off rain water and to protect the roof against moisture damage and warping. Zurn is proud to introduce its green roofing drain product line specifically suited for the unique needs of a green roof installation.