There are a few distinct types of roof drains and roof drain scupper in Leeds, AL and each is a specific solution to the wide range of roof types and their drainage issues. You need to take into consideration the kind of roof, its dimensions, and the roof pitch to be able to pick the right drain. You also should take into account the site of the drain, how much rainwater is expected and safety when selecting a roof water drain for a house or commercial building. Gambrel, dormers, hip and gable roofs shed rainwater water thanks to gravity. Flat roofs, on the other hand, accumulate water. Unless this water is routed out and away from the roof , it will create pools of water that may eventually leak and the amassed weight may eventually result in compromising the integrity of the structure. That is why roofs with a pitch of below two percent should have roof drains located in the lowest areas on the roof in which water pools and should be evenly spread all throughout the roof top.
Types of Roof Drains
There are several distinct alternatives of roof drains. They basically fall into two groups: pitched roof drains and flat roof drains. Pitched roof rainwater drains usually comprise gutters that accumulate rainwater which passes 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 Drain Scuppers
Scuppers are situated on a roof's periphery. Scuppers can also be placed 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 guided away from the building sides and foundation.
Inner Roof Drains
There are quite a few different types of inner drains for flat roofs. They are positioned at low spots in the roof and attach to interior drainage pipes that drive water outside or into a sewer system. Many styles of inner roof drains have domes, strainers or covers which keep debris from clogging the roof drain pipe. These types of drains work via gravitational force channeling pooling water thru the roof drain system. They can be made from PVC, cast iron or cast aluminum.
Siphonic Roof DrainsSiphonic roof drains are a more effective alternative to 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 which removes air from the system and permits 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 attracts rainwater off the roof siphonically. Although used mainly 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 Leeds, Alabama, give us a call. We'd be glad to help.