Roof Drains


There are several distinct kinds of roof drains and roof drain dome in Clanton, AL and each is an unique approach to the wide range of roof types and their drainage challenges. You should look at the kind of roof, its dimensions, and the roof pitch to be able to pick the correct drain. You also may want to take into consideration the location of the drain, how much rainwater is expected and safe practices when selecting a roof water drain for a residence or business building.

Gable, dormer, mansard and hip roofs shed rainwater water due to gravitational force. Flat roofs, alternatively, accumulate rain water. Until the water is directed out and away from the flat roof structure, it will most likely develop pools of water that could eventually leak and the amassed weight may eventually cause compromising the integrity of the structure. That is why roofs with a slope of under 2% ought to have roof drains located in the lowest places on the roof in which water pools and need to be uniformly spaced all throughout the roof top.

Roof Drain Types


There are several distinct alternatives of roof drains. They generally fall into 2 categories: pitched roof drains and flat roof drains. Pitched roof drains usually comprise gutters that collect rainwater which travels via gravity to the roof periphery. Gutters transport this water in the direction of downspouts which steer 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 Rainwater Drain Scuppes


Scuppers are situated on the 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 surface. Scuppers can attach to a downspout, or can be extended so that water is directed away from the structure sides and foundation.

Interior Roof Drains


There are many kinds of inner drains for flat roofs. These are positioned at low places on the roof and connect to interior drainage pipes that direct water outside or in to a sewer system. Several styles of inner roof drains have domes, strainers or covers that prevent trash from obstructing the roof drain pipe. These kinds of drains work via gravitational force funneling pooling 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 effective alternative to gravity drainage. Standard flat roof drainage permits both air and water to go into the drain system producing pipe space which is occupied by both air and water. By adding an engineered baffle to the sump of the drain body it creates 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 portion of the drain is established which pulls water off the roof siphonically. Though used primarily for flat roofs, siphonic drains can also be installed on pitched roofs.

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