Roof Drains


At this time there are several distinct varieties of roof water drains and cast iron roof drain in Montevallo, AL and each is a specific solution to the variety of roof types and their drainage challenges. You need to look at the kind of roof, its size, and its roof pitch to be able to select the most suitable drain. You also need to take into consideration the location of the drain, how much rainwater is anticipated and safe practices when selecting a roof water drain for a residence or business structure.

Gable, dormer, mansard and hip roofs shed rainwater water thanks to gravity. Flat roofs, conversely, accumulate rain water. Until the water is directed out and away from the roof structure, it will most likely develop pools that may eventually leak and the amassed weight may subsequently cause structural damage. That is why roofs with a slope of less than 2% ought to have roof drains positioned in the lowest areas on the roof where water puddles and should be uniformly spread all throughout the roof top.

Types of Roof Drains


There are a number of distinct variations of roof drains. They basically fall into two groups: pitched roof drains and flat roof drains. Pitched roof rainwater drains normally consist of gutters which collect rainwater which passes via gravity to the roof edge. Gutters channel this water in the direction of downspouts which direct the water flow down and away from the structure or in to sewers. Flat roof drains are one of three main types: scuppers, inner drains or siphonic drains.

Roof Rainwater Drain Scuppes


Scuppers are located on the roof's periphery. They can also be placed on a balcony or terrace. Small holes are cut in the side of the roof structure so that water can empty and drain the roof surface. Scuppers can hook up to a downspout, or could be extended to make sure that water is directed away from the structure sides and foundation.

Interior Roof Drains


There are quite a few different kinds of inner drains for flat roofs. They are installed at low spots on the roof and attach to interior drainage pipes that drive water outside or into a sewer system. Many styles of inner roof drains have domes, strainers or covers that keep debris from blocking the roof drain pipe. These kinds of drains operate via gravity funneling standing water thru the roof drain system. They are constructed from PVC, cast iron or cast aluminum.

Siphonic Roof Drains

Siphonic roof drains are a more effective substitute for gravity drainage. Conventional flat roof drainage allows both air and water to go into the drain system creating pipe space which is occupied by both air and water. By adding an engineered baffle to the sump of the drain body it produces a siphonic drain which eliminates air from the system and allows for smaller sized pipe diameters . When all of the air is removed, a negative air pressure in the tail piece of the drain is set up which attracts water off the roof siphonically. Although used primarily for flat roofs, siphonic drains can also be set up on angled roofs.

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