Roof Drains


There are several distinct kinds of roof water drains and roof drain downspout in Saraland, AL and each is an unique solution to the variety of roof styles and their drainage challenges. You need to think about the kind of roof, its dimensions, and the roof pitch to be able to pick the right drain. You also need to take into consideration the location of the drain, what amount of rainwater is anticipated and safety when choosing a roof water drain for a house or commercial structure.

Gable, dormer, mansard and hip roofs shed water due to gravity. Flat roofs, on the other hand, collect rain 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 eventually result in structural damage. That is why roofs with a pitch of below 2% ought to have roof drains positioned in the lowest spots on the roof where water pools and should be uniformly spread all throughout the roof top.

Types of Roof Drains


There are several different alternatives of roof drains. They generally fall into two groups: flat roof drains and pitched roof drains. Pitched roof rainwater drains normally consist of gutters which accumulate rainwater which passes by means of gravity to the roof periphery. Gutters transport this water in the direction of downspouts which steer the water flow down and away from the structure or into sewer lines. Flat roof drains are one of three primary types: scuppers, inner drains or siphonic drains.

Roof Rainwater Drain Scuppes


Scuppers are situated on the roof's perimeter. They can also be placed on a balcony or terrace. Small holes are cut into the side of the roof structure so that water can flow out and drain the roof top. Scuppers can hook up to a downspout, or can be lengthened to make sure that water is directed off of 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 spots in the roof and attach to inner drainage pipes that direct water outdoors or into 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 operate via gravity funneling standing water through the roof drain system. They are constructed from PVC, cast iron or cast aluminum.

Siphonic Roof Drains

Siphonic roof drains are a more effective substitute for gravity drainage. Traditional flat roof drainage permits both air and water to enter 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 permits smaller sized pipe diameters . When all air is removed, a negative air pressure in the tail portion of the drain is established which draws rainwater 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 downspout in and around Saraland, Alabama, give us a call. We'd be glad to help.