Roof Drains


At this time there are a few distinct types of roof water drains and roof drain pipe in Auburn, AL and each is an unique solution to the wide range of roof styles and their drainage concerns. You should take into consideration the kind of roof, its size, and its roof pitch to be able to pick the most suitable drain. You also need to take into account the location of the drain, what amount of rainwater is expected and safety when choosing a roof water drain for a residence or business building.

Gambrel, dormers, hip and gable roofs shed water thanks to gravity. Flat roofs, conversely, collect rain water. Unless this water is routed out and away from the roof structure, it will most likely develop pools that could inevitably leak and the accumulated weight may eventually cause compromising the integrity of the structure. That is why roofs with a slope of less than 2% should have roof drains located in the lowest spots on the roof where water puddles and need to be uniformly spaced throughout the roof top.

Roof Drain Kinds


There are a number of distinct variations of roof drains. They generally fall into two groups: pitched roof drains and flat roof drains. Pitched roof drains usually comprise gutters which accumulate rainwater that passes by means of gravity to the roof edge. Gutters channel this water towards downspouts which route the water flow down and away from the building or in to sewer lines. 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 perimeter. Scuppers can also be placed on a balcony or terrace. Small openings are cut in the side of the roof structure so rain 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 guided off of the structure sides and foundation.

Interior Roof Drains


There are quite a few different types of inner drains for flat roofs. They are positioned at low spots on the roof and connect to inner drainage pipes that drive water outside or in to a sewer system. Several versions of internal roof drains have domes, strainers or covers which keep trash from blocking the roof drain pipe. These kinds of drains work via gravity funneling standing water thru the roof drain system. They can be made of 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 enter the drain system producing pipe space 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 permits smaller sized pipe diameters . When all air is eliminated, a negative air pressure in the tail portion of the drain is established which draws water 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 pipe in and around Auburn, Alabama, give us a call. We'd be glad to help.