Roof Drains


At this time there are a few different types of roof water drains and roof drain pvc in Bessemer, AL and each one is a specific solution to the variety of roof types and their drainage issues. You should take into consideration the kind of roof, its size, and the roof pitch to be able to choose the most suitable drain. You also should take into account the site of the drain, what amount of rainwater is anticipated and safe practices when selecting a roof drain for a home or business building.

Hip roofs, dormers, gable and mansard roofs shed water due to gravity. Flat roofs, on the other hand, accumulate water. Unless this water is guided out and away from the flat roof structure, it will most likely create pools of water that could eventually leak and the amassed weight will subsequently cause damage to the structure. That is why roofs with a pitch of less than 2% ought to have roof drains positioned in the lowest places on the roof in which water pools and should be uniformly spaced all throughout the roof surface.

Roof Drain Types


There are a number of different alternatives of roof drains. They generally fall into 2 groups: flat roof drains and pitched roof drains. Pitched roof drains normally comprise gutters which collect rainwater which passes by means of gravity to the roof periphery. Gutters channel this water in the direction of downspouts which steer the water flow down and away from the structure or into sewers. Flat roof drains can be one of three primary types: scuppers, inner drains or siphonic drains.

Roof Rainwater Drain Scuppes


Scuppers are situated on a roof's periphery. Scuppers can also be put in on a balcony or terrace. Small holes are cut in the side of the roof structure so rain water can empty and drain the roof top. Scuppers can connect to a downspout, or could be lengthened so that water is guided off of the building sides and foundation.

Inner Roof Drains


There are quite a few different types of inner drains for flat roofs. They are installed at low places on the roof and connect to inner drainage pipes that drive water outside or in to a sewer system. Many versions of inner roof drains have domes, strainers or covers that prevent debris from blocking the roof drain pipe. These kinds of drains operate via gravity funneling standing water through the roof drain system. They are made from PVC, cast iron or cast aluminum.

Siphonic Roof Drains

Siphonic roof drains are a more efficient substitute for gravity drainage. Conventional 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 that removes air from the system and permits smaller sized pipe diameters . 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 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 pvc in and around Bessemer, Alabama, give us a call. We'd be glad to help.