Water Drainage On Flat Roof

A flat roof may use interior drains to collect water from the centre of the roof.

Water drainage on flat roof.

Removing ponding water or puddles on a flat roof can easily be done by installing a 12 shower drain from home depot. There are three types of drain systems commonly used on flat roofs. For flat roof drainage where you place your drains scuppers and the final material of the roofing is more important. The main benefit of inner drains is that the system is hidden from view.

An efficient low slope roof drainage system works entirely by gravity because water always seeks the lowest level. Of course the best designed flat roof has the correct amount of pitch to drain the water off naturally. The angle is not significant enough to prevent water from pooling on the surface. Inner roof drains are used on flat roofs and include a low section or channel that collects water and feeds it into a concealed drain that leads to an underground drainage system.

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. With this system large square openings are made along the edge of the roof that shoot the water away from the side of the building. To keep damage like leaks from occurring water should not stand on a flat roof for more than 48 hours. Each of these systems has its own pros and cons.

Although not commonly used anymore the eavestrough drainage system is a good option if you have an older large industrial or commercial flat roof. There are roof coating products available if there isn t enough slant or slope to accomplish this. Scuppers are the most effective drainage solution for flat roofs. Still the function of the two drains is the same.

Drainage options for ponding water on flat roofs no roof should be entirely flat but rather should slope either toward the perimeter or toward an interior drainage system. Ensure your drains are the lowest points on your flat roof and you can avoid water infiltration and subsequent flat roof repair. After 48 hours following a rain any roof which still has standing water is known as a ponding roof. You can take care of minor foundation drainage problems by making sure the soil slopes away from the house.

These ditches guide water toward the eavestroughs.