Roof Drains


At this time there are several different varieties of roof water drains and roof drain pan in Gardendale, AL and each is an unique approach to the wide range of roof styles and their drainage concerns. You should think about the type of roof, its dimensions, and the roof pitch to be able to pick the right drain. You also need to take into account the location of the drain, what amount of rainwater is expected and safe practices when selecting a roof drain for a house or commercial building.

Gable, dormer, mansard and hip roofs shed water thanks to gravitational force. Flat roofs, alternatively, collect rain water. Unless the water is guided out and away from the roof structure, it will create pools that may eventually leak and the amassed weight will eventually result in damage to the structure. That is why roofs with a slope of less than 2% ought to have roof drains situated at the lowest spots on the roof in which water puddles and need to be evenly spaced throughout the roof top.

Roof Drain Types


There are several distinct alternatives of roof drains. They basically fall into two groups: pitched roof drains and flat roof drains. Pitched roof rainwater drains normally consist of gutters that collect rainwater which passes via gravity to the roof edge. Gutters direct this water towards downspouts which direct the water flow down and far away from the structure or in to sewer lines. Flat roof drains can be one of three main types: scuppers, inner drains or siphonic drains.

Roof Rainwater Drain Scuppes


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

Interior Roof Drains


There are many types of inner drains for flat roofs. These are installed at low spots in the roof and connect to interior drainage pipes that direct water outside or in to a sewer system. Many models of internal roof drains have domes, strainers or covers that prevent trash from clogging the roof drain pipe. These types of drains work via gravitational force funneling standing water through the roof drain system. They are made of 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 occupied by both air and water. By incorporating an engineered baffle to the sump of the drain body it produces a siphonic drain that removes air from the system and allows for smaller sized pipe diameters to be used. When all of the air is eliminated, a negative air pressure in the tail portion 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 pan in and around Gardendale, Alabama, give us a call. We'd be glad to help.