Roof Drains


At this time there are several different types of roof water drains and roof drain scupper in Bessemer, AL and each one is an unique approach to the variety of roof styles and their drainage issues. You need to think about the kind of roof, its size, and its roof pitch to be able to choose the right drain. You also may want to take into account the site of the drain, what amount of rainwater is anticipated and safety when selecting a roof drain for a residence or business building.

Gambrel, dormers, hip and gable roofs shed water due to gravity. Flat roofs, alternatively, collect water. Until this water is guided out and away from the roof structure, it will create pools that may inevitably leak and the amassed weight will subsequently cause damage to the structure. That is the reason that roofs with a slope of under two percent should have roof drains positioned in the lowest places on the roof in which water pools and need to be evenly spaced throughout the roof top.

Roof Drain Kinds


There are a number of different alternatives of roof drains. They generally fall into two categories: pitched roof drains and flat roof drains. Pitched roof drains normally comprise gutters which collect rainwater that passes via gravity down to the roof edge. Gutters channel this water towards downspouts which direct the water flow down and far away from the structure 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 a roof's perimeter. They can also be put in on a balcony or terrace. Small openings are cut into the side of the roof structure so water can empty and drain the roof surface. Scuppers can hook up to a downspout, or could be extended so that water is directed away from the structure sides and foundation.

Interior Roof Drains


There are many kinds of inner drains for flat roofs. They are positioned at low areas in the roof and connect to interior drainage pipes that direct water outside or in to a sewer system. Several designs of internal roof drains have domes, strainers or covers that keep debris from blocking the roof drain pipe. These kinds of drains work via gravity channeling pooling water through the roof drain system. They can be made from PVC, cast iron or cast aluminum.

Siphonic Roof Drains

Siphonic roof drains are a more effective alternative to gravity drainage. Traditional flat roof drainage allows both air and water to enter 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 body it creates a siphonic drain which eliminates air from the system and permits smaller sized pipe diameters to be used. When all of the air is eliminated, a negative air pressure in the tail piece of the drain is established which draws rainwater off the roof siphonically. Though used mainly for flat roofs, siphonic drains can also be set up on pitched roofs.

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