There are several different kinds of roof drains and cast iron roof drain in Killen, AL and each is an unique answer to the wide range of roof styles and their drainage issues. You should look at the type of roof, its dimensions, and its roof pitch to be able to pick the most suitable drain. You also should take into account the site of the drain, what amount of rainwater is anticipated and safety when selecting a roof drain for a home or commercial building. Gable, dormer, mansard and hip roofs shed rainwater water due to gravity. Flat roofs, alternatively, accumulate rain water. Until this water is directed out and away from the flat roof structure, it will most likely develop pools of water that could eventually leak and the amassed weight will subsequently cause damage to the structure. That is the reason that roofs with a pitch of under 2% ought to have roof drains situated in the lowest places on the roof in which water pools and need to be evenly spread throughout the roof surface.
Roof Drain Types
There are several distinct alternatives of roof drains. They generally 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 direct this water towards downspouts which route the water flow down and away from the structure or into sewers. Flat roof drains are 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 installed on a balcony or terrace. Small openings are cut into the side of the roof structure so water can empty and drain the roof top. Scuppers can attach to a downspout, or could be extended to make sure that water is directed away from the building sides and foundation.
Inner Roof Drains
There are quite a few different types of inner drains for flat roofs. These are installed at low places in the roof and attach to interior drainage pipes that drive water outdoors or into a sewer system. Several styles of internal roof drains have domes, strainers or covers which keep debris from clogging the roof drain pipe. These kinds of drains operate via gravitational force funneling 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 allows both air and water to go into the drain system producing pipe space occupied by both air and water. By adding an engineered baffle to the sump of the drain body it creates a siphonic drain which eliminates air from the system and allows for smaller pipe diameters . When all of the air is removed, a negative air pressure in the tail piece of the drain is set up which draws water 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 cast iron roof drain in and around Killen, Alabama, give us a call. We'd be glad to help.