Flat Roof Drainage System

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

Flat roof drainage system. Drainage ditches are created in the roof in the lower insulated areas. It s also sometimes used in tandem with scuppers. A flat roof may use interior drains to collect water from the centre of the roof. The most critical of these issues is the flat roof drainage systems.

A gravity drainage system on a flat roof differs from the gutter system you find on residential roofs in two key ways. Internal drains constitute a common drainage system is most commercial buildings. Your building and location can help determine which drain will fit your roof needs. There are three types of drain systems commonly used on flat roofs.

The one challenge with flat roofing is ensuring proper drainage. They are often positioned towards the center of the roof or the place where the slope of the roof allows water to collect. There are roof coating products available if there isn t enough slant or slope to accomplish this. A residential roof collects water in the gutters and the.

Each of these systems has its own pros and cons. These ditches guide water toward the eavestroughs. The drainage pipes are placed under the roof and in the walls of the building. Scuppers internal drains gutters.

Of course the best designed flat roof has the correct amount of pitch to drain the water off naturally. These drains are like the drain at the. Although not commonly used anymore the eavestrough drainage system is a good option if you have an older large industrial or commercial flat roof. Typically flat roof drainage systems fall into one of the following categories.

This kind of drainage system is most common on small flat roofs where water volume and buildup isn t extreme. Click to enlarge any image scupper drains become blocked by leaves or other debris through building drains upper right in the sketch become clogged internally and burst flooding the building or leaks occur around the drain itself where it penetrates the roof.