Roof Drains


There are a number of different varieties of roof water drains and roof drain pvc in Leeds, AL and each one is a specific solution to the wide range of roof styles and their drainage issues. You need to consider the kind of roof, its dimensions, and the roof pitch to be able to select the most suitable drain. You also should think about the location of the drain, what amount of rainwater is expected and safe practices when choosing a roof water drain for a home or business building.

Gable, dormer, mansard and hip roofs shed rainwater water thanks to gravity. Flat roofs, conversely, accumulate water. Until this water is routed out and away from the roof , it will most likely create pools that may inevitably leak and the amassed weight will eventually result in compromising the integrity of the structure. That is why roofs with a pitch of under two percent should have roof drains situated at the lowest areas on the roof in which water pools and should be uniformly spaced throughout the roof surface.

Kinds of Roof Drains


There are a number of different alternatives of roof drains. They generally fall into two categories: pitched roof drains and flat roof drains. Pitched roof rainwater drains normally comprise gutters which accumulate rainwater that passes by means of gravity to the roof periphery. Gutters transport this water towards downspouts which steer the water flow down and away from the structure or into sewer lines. Flat roof drains can be one of three primary types: scuppers, inner drains or siphonic drains.

Roof Rainwater Drain Scuppes


Scuppers are situated on the roof's perimeter. They can also be placed on a balcony or terrace. Small openings are cut into the side of the roof structure so that water can flow out and drain the roof surface. Scuppers can attach to a downspout, or could be extended to make sure that water is directed off of the building sides and foundation.

Inner Roof Drains


There are quite a few different types of inner drains for flat roofs. They are installed at low spots in the roof and attach to interior drainage pipes that route water outside or into a sewer system. Several styles of inner roof drains have domes, strainers or covers that keep debris from obstructing the roof drain pipe. These types of drains operate via gravitational force funneling standing water through the roof drain system. They are made from PVC, cast iron or cast aluminum.

Siphonic Roof Drains

Siphonic roof drains are a more efficient alternative to gravity drainage. Standard 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 system it creates a siphonic drain that eliminates air from the system and permits smaller sized pipe diameters . When all of the air is removed, a negative air pressure in the tail portion of the drain is set up which pulls rainwater 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 pvc in and around Leeds, Alabama, give us a call. We'd be glad to help.