Roof Drains


At this time there are several distinct varieties of roof water drains and roof drain pvc in Harvest, AL and each is a specific solution to the wide range of roof types and their drainage challenges. You should look at the kind of roof, its size, and the roof pitch to be able to choose the most suitable drain. You also may want to take into account the site of the drain, how much rainwater is anticipated and safety when selecting a roof water drain for a house or business building.

Hip roofs, dormers, gable and mansard roofs shed water thanks to gravity. Flat roofs, alternatively, collect rain water. Unless the water is routed out and away from the flat roof , it will most likely develop pools of water that could eventually leak and the accumulated weight may eventually cause damage to the structure. That is why roofs with a pitch of under two percent ought to have roof drains situated in the lowest spots on the roof in which water puddles and need to be evenly spaced all throughout the roof surface.

Types of Roof Drains


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

Roof Drain Scuppers


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

Inner Roof Drains


There are many kinds of inner drains for flat roofs. They are positioned at low areas on the roof and attach to inner drainage pipes that drive water outdoors or into a sewer system. Many styles of internal roof drains have domes, strainers or covers which prevent trash from obstructing the roof drain pipe. These kinds of drains operate via gravity channeling 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 effective substitute for gravity drainage. Standard flat roof drainage allows both air and water to enter the drain system creating pipe space occupied by both air and water. By incorporating an engineered baffle to the sump of the drain system it produces a siphonic drain that eliminates air from the system and permits smaller pipe diameters to be used. When all of the air is removed, a negative air pressure in the tail piece of the drain is established which pulls water off the roof siphonically. Though 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 pvc in and around Harvest, Alabama, give us a call. We'd be glad to help.