Roof Drains


There are a number of distinct kinds of roof water drains and roof drain downspout in Athens, AL and each is a specific solution to the variety of roof types and their drainage challenges. You should consider the type of roof, its dimensions, and its roof pitch to be able to select the correct drain. You also may want to think about the location of the drain, what amount of rainwater is expected and safe practices when choosing a roof drain for a home or business building.

Gable, dormer, mansard and hip roofs shed rainwater water due to gravity. Flat roofs, alternatively, accumulate water. Unless the water is routed out and away from the flat roof , it will develop pools of water that could eventually leak and the accumulated weight may eventually result in structural damage. That is the reason that roofs with a pitch of under two percent should have roof drains positioned at the lowest areas on the roof where water pools and need to be uniformly spaced all throughout the roof top.

Roof Drain Kinds


There are a number of distinct alternatives of roof drains. They generally fall into 2 categories: pitched roof drains and flat roof drains. Pitched roof rainwater drains usually comprise gutters that accumulate rainwater that passes via gravity down to the roof edge. Gutters transport this water in the direction of downspouts which steer the water flow down and away from the building or in to sewers. Flat roof drains can be one of three primary types: scuppers, inner drains or siphonic drains.

Roof Rainwater Drain Scuppes


Scuppers are located on a roof's perimeter. They can also be put in on a balcony or terrace. Small holes are cut into the side of the roof structure so rain water can empty and drain the roof surface. Scuppers can connect to a downspout, or could be extended to make sure that water is guided away from the structure sides and foundation.

Inner Roof Drains


There are quite a few different kinds of inner drains for flat roofs. They are positioned at low places on the roof and attach to interior drainage pipes that route water outside or into a sewer system. Many models of internal roof drains have domes, strainers or covers that prevent debris from obstructing the roof drain pipe. These types of drains work via gravity channeling pooling 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 effective substitute for gravity drainage. Traditional flat roof drainage allows both air and water to enter 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 system it produces a siphonic drain that removes air from the system and allows for smaller sized pipe diameters to be used. When all of the air is removed, a negative air pressure in the tail portion of the drain is established which draws water off the roof siphonically. Though 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 roof drain downspout in and around Athens, Alabama, give us a call. We'd be glad to help.