Roof Drains


At this time there are several different kinds of roof water drains and roof drain dome in Pinson, AL and each is a specific solution to the variety of roof styles and their drainage issues. You need to think about the type of roof, its dimensions, and the roof pitch to be able to pick the right drain. You also should think about the location of the drain, how much rainwater is anticipated and safety when choosing a roof drain for a residence or commercial structure.

Hip roofs, dormers, gable and mansard roofs shed water thanks to gravity. Flat roofs, on the other hand, accumulate water. Until the water is directed out and away from the roof , it will most likely develop pools of water that may inevitably leak and the accumulated weight will subsequently cause structural damage. That is why roofs with a pitch of under 2% ought to have roof drains located in the lowest places on the roof where water puddles and need to be evenly spaced throughout the roof top.

Kinds of Roof Drains


There are a number of different alternatives of roof drains. They basically fall into two categories: flat roof drains and pitched roof drains. Pitched roof rainwater drains usually comprise gutters that accumulate rainwater which travels via gravity to the roof edge. Gutters transport this water towards downspouts which steer the water flow down and far away from the structure or in to 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 perimeter. They can also be installed on a balcony or terrace. Small holes are cut into the side of the roof structure so that rain water can flow out and drain the roof surface. Scuppers can hook up to a downspout, or could be lengthened so that water is directed off of the structure sides and foundation.

Interior Roof Drains


There are many types of inner drains for flat roofs. These are positioned at low places in the roof and connect to interior drainage pipes that route water outdoors or in to a sewer system. Several styles of inner roof drains have domes, strainers or covers that prevent trash from obstructing the roof drain pipe. These kinds of drains operate via gravity channeling pooling water thru the roof drain system. They can be constructed from PVC, cast iron or cast aluminum.

Siphonic Roof Drains

Siphonic roof drains are a more efficient substitute for gravity drainage. Traditional 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 system it creates a siphonic drain that eliminates air from the system and permits smaller sized pipe diameters to be used. When all of the air is removed, a negative air pressure in the tail piece of the drain is set up which pulls water off the roof siphonically. Although used mainly for flat roofs, siphonic drains can also be set up on angled roofs.

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