Roof Drains


At this time there are several different varieties of roof drains and roof drain scupper in Northport, AL and each one is an unique approach to the wide range of roof styles and their drainage concerns. You should consider the type of roof, its size, and the roof pitch to be able to select the right drain. You also should think about the location of the drain, how much rainwater is anticipated and safety when selecting a roof water drain for a house or commercial building.

Gambrel, dormers, hip and gable roofs shed rainwater water thanks to gravitational force. Flat roofs, on the other hand, collect rain water. Until the water is routed out and away from the flat roof , it will create pools that may inevitably leak and the accumulated weight may eventually result in structural damage. That is the reason that roofs with a slope of under 2% should have roof drains located in the lowest places on the roof where water puddles and should be uniformly spread throughout the roof surface.

Kinds of Roof Drains


There are a number of distinct alternatives of roof drains. They generally fall into two groups: flat roof drains and pitched roof drains. Pitched roof rainwater drains usually consist of gutters that collect rainwater that passes by means of gravity to the roof edge. Gutters channel this water towards downspouts which route the water flow down and away from the structure or in to 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. Scuppers can also be placed on a balcony or terrace. Small holes are cut into the side of the roof structure so water can empty and drain the roof top. Scuppers can attach to a downspout, or can be extended so that water is guided off of the structure sides and foundation.

Inner Roof Drains


There are quite a few different types of inner drains for flat roofs. They are positioned at low spots on the roof and attach to interior drainage pipes that direct water outside or into a sewer system. Many models of inner roof drains have domes, strainers or covers that keep trash from obstructing the roof drain pipe. These types of drains operate via gravity channeling 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. Standard flat roof drainage allows both air and water to go into the drain system creating pipe space occupied by both air and water. By adding an engineered baffle to the sump of the drain system it produces a siphonic drain that eliminates air from the system and allows for smaller sized pipe diameters to be used. When all of the air is removed, a negative air pressure in the tail piece of the drain is set up which draws water off the roof siphonically. Although used mainly for flat roofs, siphonic drains can also be set up on angled roofs.

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