Roof Drains


At this time there are several distinct varieties of roof drains and roof drain scupper in Oneonta, AL and each one is an unique answer to the wide range of roof styles and their drainage concerns. You need to look at the kind of roof, its dimensions, and the roof pitch to be able to select the right drain. You also may want to take into consideration the site of the drain, how much rainwater is expected and safe practices when selecting a roof water drain for a residence or commercial structure.

Gable, dormer, mansard and hip roofs shed rainwater water because of gravitational force. Flat roofs, conversely, accumulate water. Unless the water is directed out and away from the flat roof structure, it will create pools that may eventually leak and the amassed weight may eventually result in structural damage. That is the reason that roofs with a slope of under 2% ought to have roof drains located in the lowest spots on the roof in which water pools and need to be uniformly spread all throughout the roof surface.

Kinds of Roof Drains


There are a number of distinct alternatives of roof drains. They generally fall into two groups: pitched roof drains and flat roof drains. Pitched roof rainwater drains normally consist of gutters that collect rainwater that travels by means of gravity to the roof edge. Gutters transport this water in the direction of downspouts which direct the water flow down and far away from the structure or in to sewers. Flat roof drains are one of three primary types: scuppers, inner drains or siphonic drains.

Roof Drain Scuppers


Scuppers are situated on a roof's periphery. They can also be placed on a balcony or terrace. Small openings are cut in the side of the roof structure so that water can flow out and drain the roof surface. Scuppers can connect to a downspout, or could be lengthened so that water is directed away from the structure sides and foundation.

Interior Roof Drains


There are quite a few different types of inner drains for flat roofs. These are installed at low places on the roof and connect to inner drainage pipes that direct water outdoors or in to a sewer system. Several designs of inner roof drains have domes, strainers or covers that keep trash from blocking the roof drain pipe. These kinds of drains operate via gravity funneling standing water thru 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 permits both air and water to enter the drain system producing pipe space which is occupied by both air and water. By incorporating an engineered baffle to the sump of the drain body it produces a siphonic drain that eliminates air from the system and permits smaller pipe diameters to be used. When all air is removed, a negative air pressure in the tail piece of the drain is established which attracts water 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 roof drain scupper in and around Oneonta, Alabama, give us a call. We'd be glad to help.