Roof Drains


There are several distinct kinds of roof water drains and roof drain pan in Pinson, AL and each one is a specific answer to the variety of roof styles and their drainage challenges. You need to look at the type of roof, its size, and its roof pitch to be able to choose the correct drain. You also may want to think about the site of the drain, what amount of rainwater is anticipated and safe practices when selecting a roof drain for a home or commercial building.

Gambrel, dormers, hip and gable roofs shed rainwater water because of gravitational force. Flat roofs, on the other hand, collect rain water. Unless this water is directed out and away from the flat roof structure, it will most likely create pools that may inevitably leak and the accumulated weight may eventually cause compromising the integrity of the structure. That is why roofs with a slope of below two percent ought to have roof drains located in the lowest spots on the roof where water pools and should be uniformly spread all throughout the roof surface.

Roof Drain Kinds


There are a number of different variations of roof drains. They basically fall into two categories: flat roof drains and pitched roof drains. Pitched roof rainwater drains usually consist of gutters that accumulate rainwater that passes via gravity to the roof edge. Gutters channel this water towards downspouts which steer the water flow down and far away from the structure or in to sewer lines. Flat roof drains are one of three primary types: scuppers, inner drains or siphonic drains.

Roof Rainwater Drain Scuppes


Scuppers are situated on the roof's perimeter. They can also be put in on a balcony or terrace. Small openings are cut in the side of the roof structure so water can flow out and drain the roof top. Scuppers can attach to a downspout, or can be extended to make sure that water is guided away from the building sides and foundation.

Interior Roof Drains


There are many kinds of inner drains for flat roofs. They are positioned at low places in the roof and attach to interior drainage pipes that route water outside or in to a sewer system. Many models of inner roof drains have domes, strainers or covers that keep debris from blocking the roof drain pipe. These types of drains work via gravity funneling pooling water thru the roof drain system. They can be constructed from PVC, cast iron or cast aluminum.

Siphonic Roof Drains

Siphonic roof drains are a more effective alternative to gravity drainage. Conventional flat roof drainage allows both air and water to enter the drain system producing pipe space which is occupied by both air and water. By adding an engineered baffle to the sump of the drain body it produces a siphonic drain which removes air from the system and allows for smaller pipe diameters to be used. When all air is removed, a negative air pressure in the tail piece of the drain is established which draws water off the roof siphonically. Though used mainly for flat roofs, siphonic drains can also be installed on pitched roofs.

If you need more information about flat roof drain or roof drain pan in and around Pinson, Alabama, give us a call. We'd be glad to help.