Roof Drains


At this time there are a number of different types of roof water drains and roof drain system in Moulton, AL and each one is a specific answer to the wide range of roof styles and their drainage issues. You should think about the type of roof, its size, and its roof pitch to be able to select the correct drain. You also may want to think about the location of the drain, what amount of rainwater is anticipated and safe practices when choosing a roof drain for a home or business structure.

Gambrel, dormers, hip and gable roofs shed water thanks to gravity. Flat roofs, conversely, accumulate water. Until this water is routed out and away from the roof , it will most likely create pools of water that may inevitably leak and the amassed weight may subsequently result in structural damage. That is why roofs with a pitch of under two percent ought to have roof drains situated in the lowest spots on the roof where water puddles and need to be evenly spaced throughout the roof top.

Roof Drain Types


There are a number of distinct variations of roof drains. They basically fall into two groups: pitched roof drains and flat roof drains. Pitched roof drains normally consist of gutters which collect rainwater which passes via gravity to the roof edge. Gutters transport this water in the direction of downspouts which steer the water flow down and away from the building or into sewer lines. Flat roof drains are one of three primary types: scuppers, inner drains or siphonic drains.

Roof Rainwater Drain Scuppes


Scuppers are located on the roof's periphery. Scuppers can also be placed on a balcony or terrace. Small holes are cut into the side of the roof structure so that water can flow out and drain the roof top. Scuppers can connect to a downspout, or could be extended so that water is guided off of the building sides and foundation.

Interior Roof Drains


There are quite a few different types of inner drains for flat roofs. These are positioned at low spots in the roof and attach to interior drainage pipes that route water outside or into a sewer system. Many designs of inner roof drains have domes, strainers or covers which keep trash from blocking the roof drain pipe. These kinds of drains work via gravity funneling pooling water thru the roof drain system. They are constructed from PVC, cast iron or cast aluminum.

Siphonic Roof Drains

Siphonic roof drains are a more efficient alternative to gravity drainage. Conventional flat roof drainage allows both air and water to go into the drain system creating pipe space occupied by both air and water. By incorporating an engineered baffle to the sump of the drain system it produces a siphonic drain that removes air from the system and allows for smaller pipe diameters to be used. When all of the air is eliminated, a negative air pressure in the tail portion of the drain is established which pulls water off the roof siphonically. Though used mainly for flat roofs, siphonic drains can also be installed on angled roofs.

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