Rainwater Drainage Roof

It is sometimes also referred to as a downspout drain spout roof drain pipe or leader.

Rainwater drainage roof.

When closed the water simply flows through. To drain water away from your home invest in a gutter system so that rainwater on the roof doesn t leak into your foundation. The figure of 6sqm comes from earlier guidance in british standards now superseded that stated that roofs having an area of 6sqm or less do not need gutters and downpipes. A rainwater downpipe is a pipe that is used to direct rainwater away from a building typically from roof guttering to a drainage system.

The first step in sizing a roof drain is to calculate the surface area of the roof that the drains will be covering as well as the average hourly rainfall rate at the building location. If you already have gutters be sure to clean them at last once a year so that debris doesn t block them and cause water to back up. 33 0 3 83 80 78 08. Flat roof drainage falls into 2 main categories gravity drainage and syphonic drainage.

Rain diverter the rain diverter is placed between downpipes. Sizing a roof water drain. Description recommended use. When open it can fill a rain barrel for example.

Overflow is used for the transition of the rainwater drainage from the flat roof to the down pipe. The next step is to determine each roof area that will be served by a separate leader drain pipe scupper or downspout. Our exclusive dual functional structural deck flange and combination roof drains streamline specifications saving installation time and labor. Which type of rainwater outlet can prove beneficial to the design and performance of roof drainage and ultimately the building.

Syphonic drainage was developed and first used in scandinavia in the earlier 1970 s and first used in the uk in the 1980 s. They catch rainwater as it rolls off the edge of the roof and divert the water into a downspout that dispenses it a safe distance from the foundation of the building. Thanks to the integrated stainless steel grille the rainwater valve also serves as a leaf. Roof drains watts roof drains provide flexible solutions for specifiers and installers in any commercial roof application.