Roof Drains


At this time there are several distinct varieties of roof drains and roof drain strainer in Bessemer, AL and each one is a specific solution to the wide range of roof styles and their drainage challenges. You need to take into consideration the type of roof, its size, and the roof pitch to be able to pick the right drain. You also may want to take into account the location of the drain, how much rainwater is anticipated and safety when selecting a roof drain for a residence or business building.

Gambrel, dormers, hip and gable roofs shed water due to gravity. Flat roofs, alternatively, collect rain water. Unless the water is guided out and away from the flat roof , it will most likely develop pools that could inevitably leak and the amassed weight will subsequently cause structural damage. That is why roofs with a pitch of under two percent should have roof drains located at the lowest places on the roof in which water pools and should be uniformly spread all throughout the roof surface.

Kinds of Roof Drains


There are several different variations of roof drains. They generally fall into 2 categories: flat roof drains and pitched roof drains. Pitched roof drains normally comprise gutters that accumulate rainwater which travels by means of gravity down to the roof periphery. Gutters channel this water towards downspouts which route the water flow down and away from the building or in to sewer lines. Flat roof drains can be one of three primary types: scuppers, inner drains or siphonic drains.

Roof Rainwater Drain Scuppes


Scuppers are located on the roof's perimeter. Scuppers can also be placed on a balcony or terrace. Small holes are cut into the side of the roof structure so that rain water can flow out and drain the roof surface. Scuppers can hook up to a downspout, or could be lengthened to make sure that water is guided away from the building sides and foundation.

Inner Roof Drains


There are many kinds of inner drains for flat roofs. These are installed at low places in the roof and connect to inner drainage pipes that direct water outdoors or into a sewer system. Many versions of internal roof drains have domes, strainers or covers that prevent trash from blocking the roof drain pipe. These kinds of drains work via gravity funneling standing 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 alternative to gravity drainage. Conventional flat roof drainage permits both air and water to enter the drain system producing 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 allows for smaller pipe diameters to be used. When all air is eliminated, a negative air pressure in the tail portion of the drain is established which attracts water off the roof siphonically. Though 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 strainer in and around Bessemer, Alabama, give us a call. We'd be glad to help.