Roof Drains


There are a number of distinct kinds of roof drains and roof drain pvc in Northport, AL and each is an unique answer to the wide range of roof styles and their drainage concerns. You should take into consideration the kind of roof, its dimensions, and the roof pitch to be able to choose the most suitable drain. You also need to think about the location of the drain, how much rainwater is anticipated and safe practices when choosing a roof water drain for a home or business structure.

Hip roofs, dormers, gable and mansard roofs shed rainwater water thanks to gravity. Flat roofs, conversely, accumulate water. Until this water is routed out and away from the flat roof , it will create pools that may inevitably leak and the amassed weight may eventually result in structural damage. That is the reason that roofs with a pitch of below two percent ought to have roof drains positioned in the lowest places on the roof where water pools and should be uniformly spread throughout the roof top.

Types of Roof Drains


There are a number of different alternatives of roof drains. They generally fall into two categories: flat roof drains and pitched roof drains. Pitched roof rainwater drains usually comprise gutters which collect rainwater that passes by means of gravity down to the roof periphery. Gutters direct this water in the direction of downspouts which route the water flow down and far away from the structure or in to sewers. Flat roof drains can be one of three main types: scuppers, inner drains or siphonic drains.

Roof Rainwater Drain Scuppes


Scuppers are located on the roof's perimeter. Scuppers can also be installed on a balcony or terrace. Small openings are cut in the side of the roof structure so that rain water can flow out and drain the roof top. Scuppers can attach to a downspout, or could be extended so that water is guided away from the structure sides and foundation.

Inner Roof Drains


There are many kinds of inner drains for flat roofs. They are installed at low areas on the roof and attach to inner drainage pipes that drive water outside or in to a sewer system. Many versions of internal roof drains have domes, strainers or covers which keep trash from clogging the roof drain pipe. These types of drains operate via gravitational force funneling pooling water through the roof drain system. They can be 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 incorporating an engineered baffle to the sump of the drain system it produces a siphonic drain which eliminates air from the system and allows for smaller sized pipe diameters . When all air is removed, a negative air pressure in the tail piece of the drain is set up which pulls rainwater off the roof siphonically. Though used mainly for flat roofs, siphonic drains can also be installed on angled roofs.

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