At this time there are a few different varieties of roof drains and roof drain dome in Leeds, AL and each is a specific solution to the variety of roof types and their drainage issues. You must consider the kind of roof, its size, and the roof pitch to be able to choose the right drain. You also should take into account the location of the drain, how much rainwater is anticipated and safety when selecting a roof water drain for a residence or commercial structure. Gable, dormer, mansard and hip roofs shed water thanks to gravitational force. Flat roofs, on the other hand, collect rain water. Until the water is directed out and away from the flat roof structure, it will develop pools that may inevitably leak and the accumulated weight will subsequently cause structural damage. That is the reason that roofs with a slope of below two percent ought to have roof drains located in the lowest spots on the roof where water pools and need to be evenly spread throughout the roof surface.
Kinds of Roof Drains
There are several distinct alternatives of roof drains. They basically fall into 2 groups: flat roof drains and pitched roof drains. Pitched roof rainwater drains normally comprise gutters that accumulate rainwater which travels via gravity to the roof edge. Gutters transport this water in the direction of downspouts which direct the water flow down and away from the building or into sewers. Flat roof drains can be one of three primary types: scuppers, inner drains or siphonic drains.
Roof Rainwater Drain Scuppes
Scuppers are located on a roof's periphery. They can also be installed on a balcony or terrace. Small holes are cut in the side of the roof structure so water can flow out and drain the roof surface. Scuppers can attach to a downspout, or could be lengthened so that water is guided away from the building sides and foundation.
Interior Roof Drains
There are many types of inner drains for flat roofs. They are installed at low areas on the roof and attach to interior drainage pipes that route water outdoors or in to a sewer system. Several designs of inner roof drains have domes, strainers or covers which prevent trash from blocking the roof drain pipe. These types of drains work via gravity channeling standing water through the roof drain system. They are 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 producing pipe space which is occupied by both air and water. By adding an engineered baffle to the sump of the drain body it produces a siphonic drain that eliminates air from the system and allows for smaller 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 pulls rainwater 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 roof drain dome in and around Leeds, Alabama, give us a call. We'd be glad to help.