Roof Drains


There are a number of distinct varieties of roof drains and roof drain strainer in Oneonta, AL and each is a specific approach to the wide range of roof types and their drainage challenges. You should think about the type of roof, its dimensions, and the roof pitch to be able to choose the correct drain. You also may want to take into account the site of the drain, how much rainwater is anticipated and safe practices when selecting a roof water drain for a residence or business building.

Gambrel, dormers, hip and gable roofs shed water because of gravitational force. Flat roofs, alternatively, accumulate rain water. Unless this water is routed out and away from the flat roof , it will develop pools that could inevitably leak and the amassed weight will eventually cause structural damage. That is the reason that roofs with a slope of under two percent should have roof drains situated in the lowest spots on the roof in which water puddles and should be uniformly spaced all throughout the roof surface.

Roof Drain Kinds


There are several distinct variations of roof drains. They generally fall into 2 groups: pitched roof drains and flat roof drains. Pitched roof rainwater drains usually comprise gutters that accumulate rainwater that passes by means of gravity to the roof periphery. Gutters channel this water towards downspouts which route the water flow down and far away from the building or in to sewers. Flat roof drains are 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 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 connect to a downspout, or could be lengthened to make sure that water is directed away from the building sides and foundation.

Inner Roof Drains


There are many kinds of inner drains for flat roofs. They are installed at low spots in the roof and attach to interior drainage pipes that route water outside or into a sewer system. Several versions of internal roof drains have domes, strainers or covers which prevent trash from obstructing the roof drain pipe. These types of drains operate via gravity funneling standing 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. Traditional flat roof drainage allows both air and water to enter the drain system creating pipe space which is occupied by both air and water. By incorporating an engineered baffle to the sump of the drain body it creates a siphonic drain that removes air from the system and allows for smaller sized pipe diameters . When all air is eliminated, a negative air pressure in the tail piece 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 strainer in and around Oneonta, Alabama, give us a call. We'd be glad to help.