Roof Drains


There are several distinct kinds of roof drains and roof drain downspout in Montevallo, AL and each is an unique solution to the wide range of roof styles and their drainage challenges. You must take into consideration the type of roof, its size, and the roof pitch to be able to pick the most suitable drain. You also should take into consideration the site of the drain, how much rainwater is expected and safety when choosing a roof water drain for a house or business structure.

Gambrel, dormers, hip and gable roofs shed rainwater water because of gravity. Flat roofs, alternatively, accumulate water. Until this water is guided out and away from the roof structure, it will most likely develop pools of water that may inevitably leak and the accumulated weight will subsequently cause damage to the structure. That is why roofs with a slope of under two percent ought to have roof drains positioned in the lowest spots on the roof where water pools and need to be uniformly spread all throughout the roof top.

Kinds of Roof Drains


There are a number of different alternatives of roof drains. They basically fall into 2 groups: pitched roof drains and flat roof drains. Pitched roof drains normally consist of gutters which collect rainwater that travels by means of gravity to the roof edge. Gutters transport this water towards downspouts which route the water flow down and far away from the building or into sewer lines. Flat roof drains can be one of three main types: scuppers, inner drains or siphonic drains.

Roof Drain Scuppers


Scuppers are located on a roof's periphery. They can also be installed on a balcony or terrace. Small openings are cut into the side of the roof structure so rain water can flow out and drain the roof top. Scuppers can hook up to a downspout, or can be lengthened to make sure that water is directed away from the structure sides and foundation.

Interior Roof Drains


There are quite a few different types of inner drains for flat roofs. They are installed at low spots on the roof and connect to interior drainage pipes that route water outside or into a sewer system. Several versions of internal roof drains have domes, strainers or covers which prevent debris from blocking the roof drain pipe. These types of drains operate via gravity funneling standing water thru the roof drain system. They are made of PVC, cast iron or cast aluminum.

Siphonic Roof Drains

Siphonic roof drains are a more efficient substitute for gravity drainage. Conventional flat roof drainage allows both air and water to enter the drain system creating pipe space which is occupied by both air and water. By incorporating an engineered baffle to the sump of the drain body it produces a siphonic drain which removes air from the system and permits smaller pipe diameters . When all air is eliminated, a negative air pressure in the tail portion of the drain is set up which attracts water off the roof siphonically. Although used mainly for flat roofs, siphonic drains can also be installed on pitched roofs.

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