Roof Drains


At this time there are a number of distinct varieties of roof water drains and cast iron roof drain in Auburn, AL and each one is an unique approach to the wide range of roof styles and their drainage concerns. You need to take into consideration the type of roof, its size, and its roof pitch to be able to choose the correct drain. You also should take into account the location of the drain, how much rainwater is expected and safety when selecting a roof drain for a residence or commercial building.

Gable, dormer, mansard and hip roofs shed water because of gravity. Flat roofs, conversely, collect rain water. Until the water is directed out and away from the flat roof structure, it will create pools of water that may eventually leak and the accumulated weight will subsequently result in compromising the integrity of the structure. That is why roofs with a pitch of below 2% should have roof drains situated at the lowest areas on the roof where water puddles and should be evenly spaced throughout the roof top.

Roof Drain Kinds


There are several distinct alternatives of roof drains. They generally fall into 2 groups: flat roof drains and pitched roof drains. Pitched roof drains normally comprise gutters that collect rainwater that travels via gravity down to the roof edge. Gutters channel this water towards downspouts which direct the water flow down and far away from the building or into sewers. Flat roof drains are one of three main types: scuppers, inner drains or siphonic drains.

Roof Rainwater Drain Scuppes


Scuppers are located on a roof's periphery. Scuppers can also be put in on a balcony or terrace. Small openings are cut into the side of the roof structure so rain water can empty and drain the roof top. Scuppers can attach to a downspout, or could be lengthened 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 installed at low places in the roof and connect to interior drainage pipes that route water outdoors or into a sewer system. Many designs of internal roof drains have domes, strainers or covers which prevent debris from clogging the roof drain pipe. These kinds of drains work via gravity channeling pooling water thru the roof drain system. They can be made from PVC, cast iron or cast aluminum.

Siphonic Roof Drains

Siphonic roof drains are a more efficient 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 incorporating an engineered baffle to the sump of the drain system it creates a siphonic drain that removes air from the system and allows for smaller sized pipe diameters to be used. When all air is removed, a negative air pressure in the tail piece 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 pitched roofs.

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