Water Drainage On Flat Roof

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.

Water drainage on flat roof.

A flat roof may use interior drains to collect water from the centre of the roof. 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. The angle is not significant enough to prevent water from pooling on the surface. Often there s a slope approaching the house a depression in the yard that causes pooling or excess roof water draining next to the foundation.

Still the function of the two drains is the same. Each of these systems has its own pros and cons. For flat roof drainage where you place your drains scuppers and the final material of the roofing is more important. Of course the best designed flat roof has the correct amount of pitch to drain the water off naturally.

Although not commonly used anymore the eavestrough drainage system is a good option if you have an older large industrial or commercial flat roof. After 48 hours following a rain any roof which still has standing water is known as a ponding roof. Ensure your drains are the lowest points on your flat roof and you can avoid water infiltration and subsequent flat roof repair. There are roof coating products available if there isn t enough slant or slope to accomplish this.

An efficient low slope roof drainage system works entirely by gravity because water always seeks the lowest level. There are three types of drain systems commonly used on flat roofs. These ditches guide water toward the eavestroughs. 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.

Scuppers are the most effective drainage solution for flat roofs. The main benefit of inner drains is that the system is hidden from view. 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. You can take care of minor foundation drainage problems by making sure the soil slopes away from the house.

Inner drains are resistant to freezing but can require careful maintenance to prevent problems.