Roof Drains


There are several different kinds of roof water drains and roof drain scupper in Clanton, AL and each one is a specific approach to the wide range of roof types and their drainage issues. You should think about the type of roof, its dimensions, and its roof pitch to be able to choose the correct drain. You also need to take into consideration the location of the drain, how much rainwater is anticipated and safety when selecting a roof drain for a residence or business structure.

Gambrel, dormers, hip and gable roofs shed water due to gravity. Flat roofs, alternatively, accumulate water. Until the water is directed out and away from the flat roof structure, it will create pools of water that could inevitably leak and the amassed weight will eventually cause damage to the structure. That is why roofs with a slope of less than 2% ought to have roof drains situated in the lowest areas on the roof in which water pools and need to be uniformly spaced all throughout the roof surface.

Roof Drain Types


There are a number of distinct alternatives of roof drains. They generally fall into 2 groups: pitched roof drains and flat roof drains. Pitched roof drains usually consist of gutters which collect rainwater which passes by means of gravity to the roof edge. Gutters direct this water towards downspouts which route the water flow down and far away from the structure or into sewers. Flat roof drains can be one of three main types: scuppers, inner drains or siphonic drains.

Roof Drain Scuppers


Scuppers are located on a roof's perimeter. Scuppers can also be placed on a balcony or terrace. Small holes are cut in the side of the roof structure so that water can flow out and drain the roof top. Scuppers can connect to a downspout, or could be lengthened to make sure that water is guided off of the building 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 inner drainage pipes that drive water outdoors or in to a sewer system. Several styles of internal roof drains have domes, strainers or covers which keep trash from blocking the roof drain pipe. These types of drains operate via gravitational force funneling standing water thru the roof drain system. They can be made of 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 go into the drain system producing pipe space occupied by both air and water. By incorporating an engineered baffle to the sump of the drain system it produces a siphonic drain that removes air from the system and allows for smaller pipe diameters . When all air is eliminated, a negative air pressure in the tail piece of the drain is set up which attracts rainwater off the roof siphonically. Although used mainly for flat roofs, siphonic drains can also be installed on angled roofs.

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