Flat Roof Drainage System

Internal drains constitute a common drainage system is most commercial buildings.

Flat roof drainage system.

Although not commonly used anymore the eavestrough drainage system is a good option if you have an older large industrial or commercial flat roof. It s also sometimes used in tandem with scuppers. Typically flat roof drainage systems fall into one of the following categories. Your building and location can help determine which drain will fit your roof needs.

Drainage ditches are created in the roof in the lower insulated areas. Of course the best designed flat roof has the correct amount of pitch to drain the water off naturally. The one challenge with flat roofing is ensuring proper drainage. 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.

Poor drainage can lead to serious issues with flat roofing from leaks to structural damage. These drains are like the drain at the. This kind of drainage system is most common on small flat roofs where water volume and buildup isn t extreme. The drainage pipes are placed under the roof and in the walls of the building.

There are three types of drain systems commonly used on flat roofs. In most cases a flat roof will pitch in a single direction where gutters can then catch the runoff to remove it. 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. A residential roof collects water in the gutters and the.

Scuppers internal drains gutters. A flat roof may use interior drains to collect water from the centre of the roof. There are roof coating products available if there isn t enough slant or slope to accomplish this. They are often positioned towards the center of the roof or the place where the slope of the roof allows water to collect.

Each of these systems has its own pros and cons. The most critical of these issues is the flat roof drainage systems.