Roof Drains


At this time there are a number of distinct varieties of roof drains and roof drain scupper in Saraland, AL and each one is an unique approach to the wide range of roof types and their drainage challenges. You need to think about the type of roof, its dimensions, and the roof pitch to be able to select the right drain. You also may want to take into consideration the site of the drain, what amount of rainwater is expected and safety when choosing a roof drain for a residence or commercial building.

Gambrel, dormers, hip and gable roofs shed water thanks to gravity. Flat roofs, on the other hand, accumulate water. Unless this water is directed out and away from the roof , it will most likely create pools of water that could inevitably leak and the amassed weight will eventually result in structural damage. That is why roofs with a slope of less than 2% ought to have roof drains situated at the lowest areas on the roof in which water puddles and should be uniformly spread all throughout the roof top.

Kinds of Roof Drains


There are a number of distinct variations of roof drains. They generally fall into 2 groups: pitched roof drains and flat roof drains. Pitched roof rainwater drains usually comprise gutters that collect rainwater which passes by means of gravity down to the roof edge. Gutters channel this water towards downspouts which route the water flow down and away from the building or into sewer lines. Flat roof drains can be one of three primary types: scuppers, inner drains or siphonic drains.

Roof Drain Scuppers


Scuppers are situated on the roof's periphery. They can also be installed on a balcony or terrace. Small openings are cut into the side of the roof structure so water can empty and drain the roof top. Scuppers can hook up to a downspout, or could be lengthened so that water is guided away from the structure sides and foundation.

Interior Roof Drains


There are quite a few different types of inner drains for flat roofs. They are installed at low spots on the roof and attach to inner drainage pipes that drive water outdoors or in to a sewer system. Many styles of internal roof drains have domes, strainers or covers which prevent trash from blocking the roof drain pipe. These types of drains operate via gravitational force funneling standing water through the roof drain system. They can be made of PVC, cast iron or cast aluminum.

Siphonic Roof Drains

Siphonic roof drains are a more effective alternative to gravity drainage. Conventional flat roof drainage permits both air and water to go into the drain system producing pipe space which is occupied by both air and water. By adding an engineered baffle to the sump of the drain system it creates a siphonic drain which removes 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 set up which draws water off the roof siphonically. Though 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 Saraland, Alabama, give us a call. We'd be glad to help.