Roof Drains


There are a number of different types of roof drains and roof drain system in Gardendale, AL and each one is an unique approach to the wide range of roof types and their drainage concerns. You should consider the type of roof, its dimensions, and the roof pitch to be able to pick the most suitable drain. You also need to take into consideration the location of the drain, how much rainwater is expected and safety when choosing a roof drain for a house or business building.

Gable, dormer, mansard and hip roofs shed rainwater water because of gravity. Flat roofs, conversely, collect water. Until this water is routed out and away from the flat roof , it will create pools of water that may inevitably leak and the accumulated weight will subsequently result in damage to the structure. That is the reason that roofs with a slope of below 2% ought to have roof drains located at the lowest areas on the roof where water puddles and need to be uniformly spaced throughout the roof surface.

Roof Drain Kinds


There are a number of different alternatives of roof drains. They basically fall into two groups: pitched roof drains and flat roof drains. Pitched roof drains usually consist of gutters that collect rainwater which passes by means of gravity to the roof edge. Gutters channel this water in the direction of downspouts which route the water flow down and far away from the structure or into sewer lines. Flat roof drains can be one of three primary types: scuppers, inner drains or siphonic drains.

Roof Drain Scuppers


Scuppers are located on a roof's periphery. Scuppers can also be placed on a balcony or terrace. Small openings are cut into the side of the roof structure so rain water can empty and drain the roof top. Scuppers can hook up to a downspout, or could be extended so that water is directed away from the building sides and foundation.

Inner Roof Drains


There are quite a few different kinds of inner drains for flat roofs. These are installed at low areas on the roof and attach to interior drainage pipes that drive water outside or in to a sewer system. Many designs of internal roof drains have domes, strainers or covers which keep trash from clogging the roof drain pipe. These kinds of drains operate via gravity channeling 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 effective substitute for gravity drainage. Traditional flat roof drainage allows both air and water to enter 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 permits smaller pipe diameters to be used. When all of the air is removed, a negative air pressure in the tail piece of the drain is set up which draws rainwater off the roof siphonically. Though used primarily for flat roofs, siphonic drains can also be set up on angled roofs.

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