Roof Drains


At this time there are a number of distinct varieties of roof water drains and roof drain pipe in Gadsden, AL and each one is a specific solution to the variety of roof types and their drainage challenges. You need to take into consideration the kind of roof, its size, and the roof pitch to be able to choose the most suitable drain. You also should take into consideration the location of the drain, how much rainwater is expected and safety when selecting a roof water drain for a house or business structure.

Gambrel, dormers, hip and gable roofs shed rainwater water thanks to gravity. Flat roofs, alternatively, accumulate water. Unless the water is routed out and away from the roof , it will most likely develop pools that could eventually leak and the amassed weight will eventually cause structural damage. That is why roofs with a slope of below two percent should have roof drains positioned at the lowest places on the roof where water puddles and should be uniformly spaced throughout the roof top.

Roof Drain Kinds


There are several distinct variations of roof drains. They basically fall into two categories: pitched roof drains and flat roof drains. Pitched roof drains usually consist of gutters that accumulate rainwater that passes by means of gravity to the roof edge. Gutters direct this water in the direction of downspouts which direct 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 situated on a roof's periphery. Scuppers can also be put in on a balcony or terrace. Small holes are cut in the side of the roof structure so that rain water can flow out and drain the roof surface. Scuppers can connect to a downspout, or could be extended to make sure that water is directed off of the building sides and foundation.

Inner Roof Drains


There are quite a few different kinds of inner drains for flat roofs. They are installed at low areas on the roof and connect to interior drainage pipes that drive water outdoors or in to a sewer system. Several models of internal roof drains have domes, strainers or covers that prevent debris from blocking the roof drain pipe. These types of drains operate via gravitational force channeling standing water thru the roof drain system. They can be made from PVC, cast iron or cast aluminum.

Siphonic Roof Drains

Siphonic roof drains are a more efficient alternative to gravity drainage. Standard 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 adding an engineered baffle to the sump of the drain body it produces a siphonic drain which removes air from the system and permits smaller sized pipe diameters . When all air is eliminated, 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 set up on pitched roofs.

If you need more information about flat roof drain or roof drain pipe in and around Gadsden, Alabama, give us a call. We'd be glad to help.