Roof Drains


There are a number of distinct varieties of roof drains and roof drain scupper in Phenix City, AL and each is a specific answer to the variety of roof styles and their drainage issues. You need to consider the kind of roof, its dimensions, and its roof pitch to be able to choose the right drain. You also may want to take into account the location of the drain, what amount of rainwater is anticipated and safe practices when selecting a roof drain for a house or commercial building.

Gable, dormer, mansard and hip roofs shed rainwater water because of gravity. Flat roofs, on the other hand, collect rain water. Until the water is routed out and away from the flat roof , it will develop pools that may eventually leak and the amassed weight may eventually cause compromising the integrity of the structure. That is why roofs with a slope of under 2% ought to have roof drains situated in the lowest areas on the roof where water pools and should be uniformly spread all throughout the roof top.

Kinds of Roof Drains


There are several different variations of roof drains. They generally fall into two groups: flat roof drains and pitched roof drains. Pitched roof drains normally comprise gutters which collect rainwater which passes via gravity down to the roof edge. Gutters transport this water towards downspouts which route the water flow down and away from the building or in to sewers. Flat roof drains can be one of three primary types: scuppers, inner drains or siphonic drains.

Roof Drain Scuppers


Scuppers are situated on a roof's perimeter. They can also be put in on a balcony or terrace. Small openings are cut into the side of the roof structure so that water can flow out and drain the roof surface. Scuppers can hook up to a downspout, or could be extended so that water is directed away from the structure sides and foundation.

Interior Roof Drains


There are quite a few different kinds of inner drains for flat roofs. They are positioned at low spots on the roof and connect to interior drainage pipes that drive water outdoors or into a sewer system. Many styles of internal roof drains have domes, strainers or covers which keep trash from blocking the roof drain pipe. These kinds of drains work via gravitational force 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 efficient alternative to gravity drainage. Conventional flat roof drainage allows both air and water to go into the drain system creating pipe space which is occupied by both air and water. By adding an engineered baffle to the sump of the drain system it produces a siphonic drain that eliminates air from the system and allows for smaller sized pipe diameters . When all air is removed, a negative air pressure in the tail piece of the drain is set up which draws rainwater off the roof siphonically. Although used primarily for flat roofs, siphonic drains can also be set up on pitched roofs.

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