Roof Drains


At this time there are several different types of roof drains and roof drain scupper in Alabaster, AL and each is an unique answer to the wide range of roof types and their drainage challenges. You must look at the type of roof, its size, and the roof pitch to be able to select the most suitable drain. You also need to take into account the site of the drain, how much rainwater is anticipated and safe practices when choosing a roof water drain for a residence or business building.

Gambrel, dormers, hip and gable roofs shed water because of gravity. Flat roofs, conversely, collect rain water. Unless the water is guided out and away from the flat roof structure, it will develop pools of water that could inevitably leak and the accumulated weight may subsequently result in structural damage. That is why roofs with a pitch of less than 2% ought to have roof drains located at the lowest areas on the roof where water puddles and need to be uniformly spread all throughout the roof surface.

Types of Roof Drains


There are a number of different alternatives of roof drains. They generally fall into two groups: pitched roof drains and flat roof drains. Pitched roof rainwater drains normally comprise gutters which collect rainwater that travels via gravity to the roof edge. Gutters transport this water in the direction of downspouts which steer 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 Drain Scuppers


Scuppers are located on a roof's perimeter. Scuppers can also be put in on a balcony or terrace. Small openings are cut in the side of the roof structure so that rain water can flow out and drain the roof top. Scuppers can attach to a downspout, or could be lengthened to make sure that water is guided away from the structure sides and foundation.

Interior Roof Drains


There are quite a few different kinds of inner drains for flat roofs. These are positioned at low spots on the roof and connect to interior drainage pipes that direct water outdoors or in to a sewer system. Several styles of inner roof drains have domes, strainers or covers that keep debris from clogging the roof drain pipe. These kinds of drains operate via gravity channeling 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 alternative to gravity drainage. Standard flat roof drainage permits 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 body it creates a siphonic drain that removes air from the system and allows for smaller sized pipe diameters to be used. When all air is removed, a negative air pressure in the tail portion of the drain is established which pulls water off the roof siphonically. Although used mainly for flat roofs, siphonic drains can also be installed on pitched roofs.

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