Roof Drains


There are a number of distinct varieties of roof water drains and cast iron roof drain in Oneonta, AL and each is an unique solution to the variety of roof types and their drainage issues. You should look at the kind of roof, its size, and its roof pitch to be able to select the most suitable drain. You also should take into consideration the site of the drain, how much rainwater is anticipated and safe practices when selecting a roof water drain for a home or business structure.

Gambrel, dormers, hip and gable roofs shed water because of gravity. Flat roofs, on the other hand, accumulate water. Until the water is routed out and away from the flat roof , it will most likely create pools of water that may eventually leak and the accumulated weight will subsequently result in compromising the integrity of the structure. That is the reason that roofs with a pitch of under two percent should have roof drains situated at the lowest places on the roof in which water puddles and should be uniformly spread all throughout the roof top.

Types of Roof Drains


There are several different variations of roof drains. They basically fall into two categories: flat roof drains and pitched roof drains. Pitched roof drains normally consist of gutters which accumulate rainwater which passes by means of gravity down to the roof periphery. Gutters direct this water towards downspouts which direct the water flow down and far away from the building or in to sewer lines. Flat roof drains can be one of three primary types: scuppers, inner drains or siphonic drains.

Roof Drain Scuppers


Scuppers are located on a roof's periphery. Scuppers 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 top. Scuppers can connect to a downspout, or can be lengthened to make sure that water is directed away from the structure sides and foundation.

Inner Roof Drains


There are many types of inner drains for flat roofs. They are installed at low spots on the roof and attach to interior drainage pipes that route water outside or in to a sewer system. Many styles of inner roof drains have domes, strainers or covers that prevent debris from blocking the roof drain pipe. These types of drains work via gravity funneling pooling water through the roof drain system. They are constructed from PVC, cast iron or cast aluminum.

Siphonic Roof Drains

Siphonic roof drains are a more efficient alternative to gravity drainage. Conventional flat roof drainage permits both air and water to enter the drain system creating pipe space occupied by both air and water. By adding an engineered baffle to the sump of the drain body it produces a siphonic drain which removes air from the system and allows for smaller pipe diameters to be used. When all of the air is eliminated, a negative air pressure in the tail piece of the drain is established which pulls rainwater off the roof siphonically. Though used mainly for flat roofs, siphonic drains can also be installed on pitched roofs.

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