Roof Drains


At this time there are a few different varieties of roof water drains and roof drain dome in Oxford, AL and each one is an unique solution to the variety of roof types and their drainage challenges. You need to consider the kind of roof, its size, and its roof pitch to be able to choose the right drain. You also need to take into consideration the site of the drain, what amount of rainwater is expected and safe practices when selecting a roof water drain for a home or commercial building.

Gable, dormer, mansard and hip roofs shed water thanks to gravity. Flat roofs, conversely, collect rain water. Unless this water is routed out and away from the roof structure, it will develop pools that could eventually leak and the amassed weight will eventually result in structural damage. That is why roofs with a slope of under 2% ought to have roof drains positioned at the lowest spots on the roof in which water pools and need to be uniformly spaced throughout the roof surface.

Roof Drain Types


There are a number of distinct alternatives of roof drains. They basically fall into two categories: flat roof drains and pitched roof drains. Pitched roof rainwater drains usually consist of gutters that collect rainwater that travels via gravity to the roof periphery. Gutters channel this water towards downspouts which route the water flow down and far away from the building or into sewers. Flat roof drains can be one of three main types: scuppers, inner drains or siphonic drains.

Roof Rainwater Drain Scuppes


Scuppers are situated on a roof's perimeter. Scuppers can also be installed on a balcony or terrace. Small openings are cut in the side of the roof structure so that rain water can empty and drain the roof surface. Scuppers can connect to a downspout, or can be lengthened to make sure that water is directed off of the structure sides and foundation.

Interior Roof Drains


There are many kinds of inner drains for flat roofs. These are positioned at low spots in the roof and connect to interior drainage pipes that drive water outside or in to a sewer system. Many models of internal roof drains have domes, strainers or covers which prevent debris from obstructing the roof drain pipe. These kinds of drains operate via gravity channeling standing water thru the roof drain system. They are made from PVC, cast iron or cast aluminum.

Siphonic Roof Drains

Siphonic roof drains are a more effective 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 produces a siphonic drain that removes air from the system and allows for smaller pipe diameters to be used. When all air is eliminated, a negative air pressure in the tail portion of the drain is set up which pulls water off the roof siphonically. Although used primarily for flat roofs, siphonic drains can also be installed on angled roofs.

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