How To Drain A Flat Roof

There are several drainage options to repair pooling or ponding water on flat roofs including internal drains gutters and downspouts scuppers and roof leveling compounds.

How to drain a flat roof.

The above sizing data is offered as a guide only. One of the most overlooked items on a flat roof is the draining system. The angle is not significant enough to prevent water from pooling on the surface. For flat roof drainage where you place your drains scuppers and the final material of the roofing is more important.

This system works by recessing insulation in installed drains to allow for faster water drainage. A flat roof drain is one of the most important features of a flat roof design and they need to be taken care of. This table is based on zurn s roof drain vertical requirement for horizontal roof areas at various rainfall rates table. Interior drains work just like the drain in your shower or sink.

The greenslope roof ponding repair kit provides a lightweight inexpensive solution to flat roof ponding. 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. Leaving your flat roof without a drainage system will greatly increase the risk of these issues. Flat roof drains scuppers gutters and drainage systems on flat roofs.

More attention should be given to the location of a drainage system to avoid future problems. Ensure your drains are the lowest points on your flat roof and you can avoid water infiltration and subsequent flat roof repair. To keep damage like leaks from occurring water should not stand on a flat roof for more than 48 hours. Inner drains gutters or scuppers each have their own function and deciding which system is best depends on.

If a flat roof drain is too small it can easily become blocked or simply not be in the right area for accurate draining of pooling water. Calculate drains needed. The result is the number of drains needed. Take the roof s total square footage and divide by the total square footage handled by one drain.

They are ideal for climates that don t experience large quantities of rain and moisture. Ponding water on flat roofs reduces the roof s lifespan. The 3 most common drain systems of a flat roof. Fitting the roof with one of the following systems to ensure proper drainage will help keep it protected.

Flat roofs have unique architectural characteristics that make them desirable in many situations.