Roof Drains


There are several distinct kinds of roof drains and roof drain downspout in Northport, AL and each is a specific answer to the wide range of roof styles and their drainage challenges. You should look at the kind of roof, its dimensions, and the roof pitch to be able to pick the most suitable drain. You also should take into account the site of the drain, what amount of rainwater is anticipated and safe practices when choosing a roof drain for a home or business building.

Gambrel, dormers, hip and gable roofs shed rainwater water because of gravity. Flat roofs, alternatively, accumulate rain water. Unless the water is guided out and away from the flat roof structure, it will most likely create pools that may inevitably leak and the accumulated weight will subsequently result in structural damage. That is why roofs with a slope of under two percent ought to have roof drains positioned at the lowest areas on the roof where water pools and should be evenly spaced throughout the roof top.

Roof Drain Types


There are several different variations of roof drains. They basically fall into 2 groups: pitched roof drains and flat roof drains. Pitched roof drains usually comprise gutters which accumulate rainwater which travels by means of gravity to the roof periphery. Gutters channel this water towards downspouts which direct the water flow down and far away from the structure or into 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 put in on a balcony or terrace. Small holes are cut into the side of the roof structure so water can empty and drain the roof surface. Scuppers can hook up to a downspout, or can be extended so that water is guided off of the building sides and foundation.

Interior Roof Drains


There are quite a few different kinds of inner drains for flat roofs. These are positioned at low areas on the roof and connect to interior drainage pipes that drive water outdoors or in to a sewer system. Many designs of inner roof drains have domes, strainers or covers that prevent debris from clogging the roof drain pipe. These types of drains operate via gravity funneling pooling water thru the roof drain system. They are made from PVC, cast iron or cast aluminum.

Siphonic Roof Drains

Siphonic roof drains are a more effective alternative to gravity drainage. Conventional 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 that eliminates air from the system and allows for 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 pulls water off the roof siphonically. Although used primarily for flat roofs, siphonic drains can also be installed on angled roofs.

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