There are a few distinct kinds of roof drains and cast iron roof drain in Athens, AL and each is a specific approach to the wide range of roof styles and their drainage concerns. You must look at the kind of roof, its dimensions, and its roof pitch to be able to select the right drain. You also need to take into consideration the site of the drain, what amount of rainwater is anticipated and safety when choosing a roof drain for a residence or commercial structure. Gambrel, dormers, hip and gable roofs shed rainwater water because of gravity. Flat roofs, conversely, collect water. Unless the water is directed out and away from the flat roof , it will develop pools that may eventually leak and the accumulated weight will eventually cause structural damage. That is the reason that roofs with a slope of under two percent should have roof drains situated in the lowest spots on the roof where water pools and should be evenly spaced all throughout the roof top.
Roof Drain Kinds
There are several distinct variations of roof drains. They basically fall into 2 groups: flat roof drains and pitched roof drains. Pitched roof rainwater drains normally consist of gutters which collect rainwater which passes by means of gravity to the roof periphery. Gutters channel this water towards downspouts which direct the water flow down and away from the structure or in to sewers. Flat roof drains are one of three main types: scuppers, inner drains or siphonic drains.
Roof Rainwater Drain Scuppes
Scuppers are situated on a roof's perimeter. They can also be placed on a balcony or terrace. Small holes are cut into the side of the roof structure so water can flow out and drain the roof top. Scuppers can attach to a downspout, or could be extended to make sure that water is guided off of the building sides and foundation.
Interior Roof Drains
There are quite a few different kinds of inner drains for flat roofs. These are installed at low places on the roof and attach to interior drainage pipes that route water outside or into a sewer system. Several versions of internal roof drains have domes, strainers or covers which prevent trash from blocking the roof drain pipe. These kinds of drains operate via gravity channeling pooling water through the roof drain system. They can be made from PVC, cast iron or cast aluminum.
Siphonic Roof DrainsSiphonic roof drains are a more effective substitute for gravity drainage. Standard flat roof drainage allows both air and water to go into the drain system producing 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 removes air from the system and allows for smaller sized pipe diameters to be used. When all of the air is removed, a negative air pressure in the tail portion of the drain is established which draws water off the roof siphonically. Though used primarily for flat roofs, siphonic drains can also be installed on angled roofs.
If you need more information about flat roof drain or cast iron roof drain in and around Athens, Alabama, give us a call. We'd be glad to help.