Internal Flat Roof Drainage

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.

Internal flat roof drainage.

Increase your building s curb appeal and beauty with custom fittings. 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. At page top and at left our photos show a low slope roof surrounded by a parapet. A flat roof may use interior drains to collect water from the centre of the roof.

The angle is not significant enough to prevent water from pooling on the surface. Drainage ditches are created in the roof in the lower insulated areas. Most draining systems on flat roofs have a poor design or are not correctly installed. On large flat roofs mainly on commercial buildings or large residential complexes you ll likely find internal drainage systems.

Breaking down the pros and cons of flat roof drains. 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. These ditches guide water toward the eavestroughs.

Poor drainage can lead to serious issues with flat roofing from leaks to structural damage. 50 000 4 400 11 36. The result is the number of drains needed. 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.

Strainers for inner drains are best when custom made to fit your roof and your particular climate. They assist in keeping any debris from clogging the drain. 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. It is very critical to position drains for maximum effect.

Inner drains are customizable as an attractive feature of your flat roof. The one challenge with flat roofing is ensuring proper drainage. Watch for clogs blockage at the roof drain or scupper. A gravity drainage system on a flat roof differs from the gutter system you find on residential roofs in two key ways.

Or 12 drains required. Take the roof s total square footage and divide by the total square footage handled by one drain. There must be some momentum for the water to move into the flat roof drainage system. To keep damage like leaks from occurring water should not stand on a flat roof for more than 48 hours.

Roofs of this design will have one or more roof drains or scuppers installed.