Roof Drains


There are several different kinds of roof water drains and roof drain pipe in Montevallo, AL and each is an unique approach to the variety of roof types and their drainage issues. You should consider the kind of roof, its dimensions, and its roof pitch to be able to choose the right drain. You also need to take into consideration the site of the drain, how much rainwater is anticipated and safety when choosing a roof drain for a residence or commercial building.

Gambrel, dormers, hip and gable roofs shed rainwater water because of gravity. Flat roofs, alternatively, collect water. Until this water is routed out and away from the flat roof , it will create pools that may eventually leak and the accumulated weight will subsequently cause compromising the integrity of the structure. That is the reason that roofs with a slope of less than two percent ought to have roof drains positioned at the lowest places on the roof where water puddles and need to be uniformly spaced throughout the roof top.

Kinds of Roof Drains


There are several distinct alternatives of roof drains. They basically fall into two groups: flat roof drains and pitched roof drains. Pitched roof drains normally comprise gutters that collect rainwater which travels by means of gravity to the roof edge. Gutters direct this water towards downspouts which direct the water flow down and away from the building or in to sewer lines. Flat roof drains are one of three primary types: scuppers, inner drains or siphonic drains.

Roof Rainwater Drain Scuppes


Scuppers are located on the roof's perimeter. Scuppers can also be placed on a balcony or terrace. Small openings are cut in the side of the roof structure so that water can empty and drain the roof top. Scuppers can connect to a downspout, or could be extended so that water is directed away from the building sides and foundation.

Inner Roof Drains


There are quite a few different kinds of inner drains for flat roofs. These are positioned at low places in the roof and connect to interior drainage pipes that drive water outdoors or in to a sewer system. Many designs of internal roof drains have domes, strainers or covers which keep trash from obstructing the roof drain pipe. These kinds of drains work via gravity funneling pooling water thru the roof drain system. They are constructed from PVC, cast iron or cast aluminum.

Siphonic Roof Drains

Siphonic roof drains are a more efficient substitute for gravity drainage. Standard flat roof drainage allows both air and water to go into the drain system producing pipe space which is occupied by both air and water. By incorporating an engineered baffle to the sump of the drain system it creates a siphonic drain which removes air from the system and permits smaller 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 pulls 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 roof drain pipe in and around Montevallo, Alabama, give us a call. We'd be glad to help.