Roof Drains


There are a few distinct kinds of roof drains and roof drain downspout in Oxford, AL and each is an unique answer to the variety of roof types and their drainage challenges. You need to look at the type of roof, its size, and its roof pitch to be able to select the right drain. You also may want to take into account the location of the drain, what amount of rainwater is anticipated and safety when selecting a roof water drain for a house or business building.

Hip roofs, dormers, gable and mansard roofs shed water thanks to gravity. Flat roofs, conversely, collect water. Until this water is routed out and away from the roof structure, it will most likely create pools that may inevitably leak and the amassed weight may subsequently cause compromising the integrity of the structure. That is the reason that roofs with a pitch of under two percent ought to have roof drains located in the lowest areas on the roof where water pools and need to be uniformly spaced all throughout the roof surface.

Roof Drain Kinds


There are a number of different alternatives of roof drains. They basically fall into two groups: flat roof drains and pitched roof drains. Pitched roof drains normally comprise gutters which collect rainwater which travels via gravity to the roof periphery. Gutters transport this water in the direction of downspouts which route the water flow down and far away from the structure or into sewer lines. Flat roof drains are one of three main types: scuppers, inner drains or siphonic drains.

Roof Rainwater Drain Scuppes


Scuppers are situated on the roof's perimeter. They can also be installed on a balcony or terrace. Small openings are cut into the side of the roof structure so rain water can flow out and drain the roof surface. Scuppers can hook up to a downspout, or can be extended so that water is directed away from the structure sides and foundation.

Inner Roof Drains


There are quite a few different types of inner drains for flat roofs. These are positioned at low places in the roof and attach to interior drainage pipes that drive water outdoors or in to a sewer system. Many designs of inner roof drains have domes, strainers or covers which keep debris from blocking the roof drain pipe. These kinds of drains operate via gravitational force funneling 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 effective substitute for gravity drainage. Conventional flat roof drainage permits both air and water to go into the drain system creating pipe space which is occupied by both air and water. By adding an engineered baffle to the sump of the drain body it creates a siphonic drain which eliminates air from the system and allows for smaller pipe diameters to be used. When all air is removed, a negative air pressure in the tail piece of the drain is established which pulls rainwater 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 downspout in and around Oxford, Alabama, give us a call. We'd be glad to help.