Internal Flat Roof Drainage

It is very critical to position drains for maximum effect.

Internal flat roof drainage.

Most draining systems on flat roofs have a poor design or are not correctly installed. The result is the number of drains needed. These ditches guide water toward the eavestroughs. Take the roof s total square footage and divide by the total square footage handled by one drain.

Inner drains are customizable as an attractive feature of your flat roof. Furthermore flat roofs with internal drainage are built to direct water to the central points of the structure with a concave shape the opposite of a pitched roof. They assist in keeping any debris from clogging the drain. The drainage requirements for flat roofs on buildings present some special problems that we describe and illustrate here.

So often we find that inner drains are high on the roof causing water to pool around them. A gravity drainage system on a flat roof differs from the gutter system you find on residential roofs in two key ways. To keep damage like leaks from occurring water should not stand on a flat roof for more than 48 hours. There are three types of drain systems on a flat roof.

These drains are like the drain at the bottom of your shower except that the roof drain has a larger strainer to protect it from debris. At page top and at left our photos show a low slope roof surrounded by a parapet. Drainage ditches are created in the roof in the lower insulated areas. Drainage helpers drainage helpers are a good option if you already have a good flat roof drain system but want to provide your system with the ability to move more water if need be.

Unlike scupper or gutter drainage systems in which water flows off the side of the roof internal systems allow for drains to be strategically placed throughout a roof deck to ensure water doesn t pool. The angle is not significant enough to prevent water from pooling on the surface. Or 12 drains required. For flat roof drainage where you place your drains scuppers and the final material of the roofing is more important.

A flat roof may use interior drains to collect water from the centre of the roof. 50 000 4 400 11 36. Increase your building s curb appeal and beauty with custom fittings. Roofs of this design will have one or more roof drains or scuppers installed.

Strainers for inner drains are best when custom made to fit your roof and your particular climate. The one challenge with flat roofing is ensuring proper drainage. Breaking down the pros and cons of flat roof drains. There must be some momentum for the water to move into the flat roof drainage system.

Watch for clogs blockage at the roof drain or scupper.