Roof Drains


There are several distinct varieties of roof water drains and roof drain dome in Attalla, AL and each is a specific answer to the variety of roof types and their drainage challenges. You should look at the type of roof, its dimensions, and its roof pitch to be able to pick the most suitable drain. You also need to take into account the site of the drain, how much rainwater is expected and safe practices when selecting a roof drain for a residence or business structure.

Gable, dormer, mansard and hip roofs shed rainwater water thanks to gravitational force. Flat roofs, alternatively, accumulate water. Unless the water is routed out and away from the roof , it will create pools that may inevitably leak and the amassed weight will subsequently cause damage to the structure. That is why roofs with a pitch of under two percent should have roof drains situated in the lowest places on the roof where water pools and need to be uniformly spread all throughout the roof top.

Roof Drain Kinds


There are several different alternatives of roof drains. They generally fall into two groups: flat roof drains and pitched roof drains. Pitched roof drains normally consist of gutters that collect rainwater that travels by means of gravity down to the roof periphery. Gutters transport this water towards downspouts which route the water flow down and 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 situated on a 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 that 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 kinds of inner drains for flat roofs. They are installed at low areas in the roof and attach to inner drainage pipes that route water outdoors or in to a sewer system. Several designs of internal roof drains have domes, strainers or covers which prevent trash from clogging the roof drain pipe. These kinds of drains operate via gravity channeling 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 efficient substitute for gravity drainage. Traditional flat roof drainage allows both air and water to go into the drain system producing pipe space occupied by both air and water. By incorporating an engineered baffle to the sump of the drain body it produces a siphonic drain which removes air from the system and permits smaller sized pipe diameters . When all of the air is removed, a negative air pressure in the tail portion of the drain is established which pulls water off the roof siphonically. Although used primarily for flat roofs, siphonic drains can also be installed on pitched roofs.

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