How Low Slope Roofs Shed Water

How Low Slope Roofs Shed Water

Low slope roofing, also known as flat roofing, is more commonly a part of industrial or commercial buildings like warehouse and factories. However, a lot of flat buildings also have a low slope roofing system.

The term low slope in low slope roofing describes the pitch or the incline of the roof. Low slope roofs generally range from almost flat to 4-over-12. This roofing on commercial buildings, generally, has a slope of not more than 3 inches per foot, which means that the level of the roof increases vertically by 3 inches for every foot. Even roofing that might be seemingly flat has at least a slight slope of about ¼ per foot.

The reason that all roofs have at least a small slope is to ensure there is proper drainage and the roof can shed water. After a rain, proper water drainage is essential and there should not be any standing water on the roof to prevent leaks that can weaken the ceiling structure, which is why every good roof should be able to carry out proper drainage.

Most commercial buildings utilize drains to shed water. The water is directed to these drains with the help of small areas named saddles and crickets.

Low sloping roofing has the drains at the lowest point of the roof. They’re called valleys and are the low points where two slopes converge.

The two types of drains used for low slope roofs are interior and exterior. Both the drains can also be used together to enhance the drainage capabilities. An example of a drain that is exterior is an overflow supper. It can ensure that the roof sheds water in case the interior drain gets blocked.

Since there are a lot of low slope roofing options with varying conditions for the deck type, insulation and roof membrane is the drainage system that would be the most effective and depends on the individual design of the low slope roof. For a better understanding of low slope roofing, contact your local roofing company.