Slope Flat Roof Drainage

There are three types of drain systems commonly used on flat roofs.

Slope flat roof drainage.

The drainage requirements for flat roofs on buildings present some special problems that we describe and illustrate here. 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. The one challenge with flat roofing is ensuring proper drainage. Drainage options for ponding water on flat roofs internal drains.

Each of these systems has its own pros and cons. The maximum rainfall rate anticipated in the area where the building is located the flow in liters per minute per square meter for some x number of minutes. At page top and at left our photos show a low slope roof surrounded by a parapet. To design a sloped or flat roof drainage system we need to know several things.

Before you think about how to make a flat roof have a pitch consider our 3 alternatives. Watch for clogs blockage at the roof drain or scupper. Good contractors know the best way on how to slope a flat roof for drainage. A major maintenance issue shared between all types of roof drains is debris removal.

Is your roofing system showing signs of damage. Poor drainage can lead to serious issues with flat roofing from leaks to structural damage. Don t spend your money unnecessarily if there are tried and true remedies you can leverage. For flat roof drainage where you place your drains scuppers and the final material of the roofing is more important.

There are roof coating products available if there isn t enough slant or slope to accomplish this. The roofslope auxiliary sloping compound provides a quick and easy way to fill in low spots on flat roofs and achieve positive slope to aid in proper drainage. These are fitted at either end of a parapet wall meaning the flat is typically angled in two directions. Usually installed at the centre of the property this drain transports water.

This patented technology provides a durable finish with the ability to match existing roofing compositions. Roofs of this design will have one or more roof drains or scuppers installed. Of course the best designed flat roof has the correct amount of pitch to drain the water off naturally. Gutters and downspouts transport water off a roof defending the cladding system as well as the.

Your building and location can help determine which drain will fit your roof needs. The angle is not significant enough to prevent water from pooling on the surface.