Roof Drains


There are a few different varieties of roof drains and cast iron roof drain in Northport, AL and each one is an unique solution to the variety of roof styles and their drainage issues. You must think about the type of roof, its dimensions, and its roof pitch to be able to choose the most suitable drain. You also should take into account the site of the drain, how much rainwater is expected and safety when selecting a roof drain for a residence or business building.

Hip roofs, dormers, gable and mansard roofs shed water due to gravitational force. Flat roofs, alternatively, accumulate water. Unless the water is routed out and away from the flat roof , it will most likely develop pools that may inevitably leak and the amassed weight will subsequently cause damage to the structure. That is the reason that roofs with a slope of below two percent should have roof drains positioned at the lowest areas on the roof in which water pools and should be uniformly spaced throughout the roof top.

Types of Roof Drains


There are several distinct variations of roof drains. They basically fall into two categories: pitched roof drains and flat roof drains. Pitched roof rainwater drains normally comprise gutters which accumulate rainwater which passes by means of gravity down to the roof edge. Gutters direct 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 Rainwater Drain Scuppes


Scuppers are situated on the roof's perimeter. They can also be installed on a balcony or terrace. Small openings are cut into the side of the roof structure so water can empty and drain the roof top. Scuppers can hook up to a downspout, or can be lengthened to make sure that water is guided away from the building sides and foundation.

Inner Roof Drains


There are quite a few different types of inner drains for flat roofs. They are positioned at low areas in the roof and attach to interior drainage pipes that drive water outside or into a sewer system. Several versions of inner roof drains have domes, strainers or covers that prevent debris from blocking the roof drain pipe. These kinds of drains operate via gravitational force funneling pooling water through the roof drain system. They can be constructed from PVC, cast iron or cast aluminum.

Siphonic Roof Drains

Siphonic roof drains are a more efficient 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 system it creates a siphonic drain which removes air from the system and allows for smaller sized pipe diameters to be used. When all air is removed, a negative air pressure in the tail portion of the drain is established which attracts water off the roof siphonically. Although used mainly for flat roofs, siphonic drains can also be set up on angled roofs.

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