At this time there are a number of distinct varieties of roof drains and cast iron roof drain in Birmingham, AL and each is an unique answer to the wide range of roof types and their drainage challenges. You must take into consideration the kind of roof, its dimensions, and its 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 anticipated and safe practices when choosing a roof drain for a house or business structure. Gambrel, dormers, hip and gable roofs shed rainwater water thanks to gravity. Flat roofs, on the other hand, accumulate rain water. Unless the water is routed out and away from the roof structure, it will develop pools that could eventually leak and the amassed weight will subsequently cause damage to the structure. That is the reason that roofs with a slope of below 2% ought to have roof drains situated at the lowest places on the roof where water puddles and should be evenly spaced all throughout the roof surface.
Roof Drain Kinds
There are a number of distinct variations of roof drains. They basically fall into two categories: flat roof drains and pitched roof drains. Pitched roof rainwater drains usually comprise gutters that accumulate rainwater that travels by means of gravity to the roof edge. Gutters channel this water in the direction of downspouts which route the water flow down and away from the structure or in to sewers. Flat roof drains are one of three primary types: scuppers, inner drains or siphonic drains.
Roof Rainwater Drain Scuppes
Scuppers are located on a roof's perimeter. They can also be put in on a balcony or terrace. Small openings are cut in the side of the roof structure so that rain water can empty and drain the roof surface. Scuppers can connect to a downspout, or can be lengthened so that water is guided away from the structure sides and foundation.
Inner Roof Drains
There are many types of inner drains for flat roofs. These are positioned at low spots on the roof and attach to inner drainage pipes that route water outside or into a sewer system. Several styles of internal roof drains have domes, strainers or covers which prevent trash from obstructing the roof drain pipe. These kinds of drains operate via gravitational force channeling pooling water through the roof drain system. They can be constructed from PVC, cast iron or cast aluminum.
Siphonic Roof DrainsSiphonic roof drains are a more effective alternative to gravity drainage. Conventional flat roof drainage permits both air and water to go into 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 produces a siphonic drain which removes air from the system and allows for smaller sized pipe diameters . When all of the air is removed, a negative air pressure in the tail portion of the drain is set up which attracts water off the roof siphonically. Although used mainly for flat roofs, siphonic drains can also be set up on angled roofs.
If you need more information about flat roof drain or cast iron roof drain in and around Birmingham, Alabama, give us a call. We'd be glad to help.