At this time there are several different kinds of roof drains and cast iron roof drain in Gadsden, AL and each is an unique approach to the variety of roof types and their drainage issues. You should take into consideration the kind of roof, its dimensions, and its roof pitch to be able to pick the right drain. You also may want to think about the site of the drain, how much rainwater is expected and safe practices when selecting a roof water drain for a house or business building. Hip roofs, dormers, gable and mansard roofs shed water thanks to gravity. Flat roofs, on the other hand, accumulate water. Unless this water is directed out and away from the flat roof , it will most likely develop pools of water that may eventually leak and the amassed weight will subsequently cause compromising the integrity of the structure. That is the reason that roofs with a pitch of less than two percent ought to have roof drains situated in the lowest areas on the roof in which water pools and should be uniformly spread all throughout the roof surface.
Roof Drain Kinds
There are several distinct alternatives of roof drains. They generally fall into 2 groups: flat roof drains and pitched roof drains. Pitched roof drains usually comprise gutters which collect rainwater that passes via gravity down to the roof edge. Gutters channel this water in the direction of downspouts which steer the water flow down and away from the structure or into 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 periphery. They can also be put in on a balcony or terrace. Small openings are cut in the side of the roof structure so water can flow out and drain the roof top. Scuppers can hook up to a downspout, or can be lengthened to make sure that water is directed away from the structure sides and foundation.
Inner Roof Drains
There are quite a few different types of inner drains for flat roofs. They are positioned at low areas on the roof and connect to interior drainage pipes that route water outside or into a sewer system. Many versions of internal roof drains have domes, strainers or covers that keep debris from clogging the roof drain pipe. These types 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 DrainsSiphonic roof drains are a more efficient alternative to gravity drainage. Conventional flat roof drainage allows both air and water to enter the drain system creating pipe space which is 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 sized pipe diameters to be used. When all of the air is eliminated, a negative air pressure in the tail piece of the drain is established which draws rainwater off the roof siphonically. Although 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 cast iron roof drain in and around Gadsden, Alabama, give us a call. We'd be glad to help.