Roof Drains


At this time there are a few different kinds of roof drains and roof drain scupper in Gardendale, AL and each one is an unique answer to the wide range of roof types and their drainage challenges. You should consider the kind of roof, its size, and its roof pitch to be able to pick the correct drain. You also may want to take into account the location of the drain, what amount of rainwater is anticipated and safe practices when choosing a roof drain for a house or business building.

Hip roofs, dormers, gable and mansard roofs shed water thanks to gravity. Flat roofs, conversely, collect rain water. Until the water is directed out and away from the roof structure, it will most likely create pools that could eventually leak and the accumulated weight will subsequently cause compromising the integrity of the structure. That is the reason that roofs with a pitch of below 2% ought to have roof drains located at the lowest areas on the roof in which water pools and should be uniformly spaced all throughout the roof surface.

Kinds of Roof Drains


There are a number of distinct alternatives of roof drains. They basically fall into two groups: flat roof drains and pitched roof drains. Pitched roof drains normally comprise gutters which collect rainwater that travels via gravity down to the roof periphery. Gutters direct this water towards downspouts which direct the water flow down and far away from the structure or in to sewer lines. Flat roof drains can be one of three primary types: scuppers, inner drains or siphonic drains.

Roof Rainwater Drain Scuppes


Scuppers are located on a roof's perimeter. Scuppers can also be installed on a balcony or terrace. Small holes are cut in the side of the roof structure so that 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 directed off of the structure sides and foundation.

Inner Roof Drains


There are quite a few different kinds of inner drains for flat roofs. These are positioned at low places in the roof and attach to interior drainage pipes that route water outside or into a sewer system. Many versions of inner roof drains have domes, strainers or covers which prevent trash from blocking the roof drain pipe. These kinds of drains work via gravitational force funneling standing 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 efficient substitute for gravity drainage. Traditional 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 incorporating an engineered baffle to the sump of the drain body it creates a siphonic drain that eliminates air from the system and allows for smaller pipe diameters . When all air is eliminated, a negative air pressure in the tail piece of the drain is established which pulls rainwater off the roof siphonically. Though used primarily for flat roofs, siphonic drains can also be installed on pitched roofs.

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