Roof Drains


There are a few distinct varieties of roof water drains and roof drain cover in Huntsville, AL and each one is a specific solution to the wide range of roof types and their drainage issues. You must think about the kind of roof, its size, and its roof pitch to be able to pick the correct drain. You also need to take into account the location of the drain, what amount of rainwater is anticipated and safety when selecting a roof drain for a house or commercial structure.

Gambrel, dormers, hip and gable roofs shed water thanks to gravity. Flat roofs, conversely, accumulate rain water. Until this water is routed out and away from the flat roof , it will develop pools that may inevitably leak and the accumulated weight may subsequently result in structural damage. That is why roofs with a slope of below two percent ought to have roof drains situated at the lowest areas on the roof in which water pools and should be uniformly spaced throughout the roof top.

Roof Drain Kinds


There are a number of different alternatives of roof drains. They basically fall into two groups: pitched roof drains and flat roof drains. Pitched roof drains usually consist of gutters which accumulate rainwater that travels by means of gravity down to the roof periphery. Gutters transport this water towards downspouts which direct the water flow down and away from the structure or in to sewer lines. Flat roof drains can be one of three main 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 into the side of the roof structure so rain water can flow out and drain the roof surface. Scuppers can hook up to a downspout, or can be lengthened so that water is guided away from the building sides and foundation.

Interior Roof Drains


There are quite a few different kinds of inner drains for flat roofs. They are positioned at low spots on the roof and attach to inner drainage pipes that drive water outdoors or in to a sewer system. Several models of internal roof drains have domes, strainers or covers which prevent debris from clogging the roof drain pipe. These kinds of drains operate via gravity funneling pooling water through 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 alternative to gravity drainage. Standard flat roof drainage allows both air and water to go into 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 removes air from the system and permits smaller sized pipe diameters . When all of the air is eliminated, a negative air pressure in the tail piece of the drain is set up which attracts water off the roof siphonically. Although 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 cover in and around Huntsville, Alabama, give us a call. We'd be glad to help.