Roof Drains


At this time there are a number of different varieties of roof water drains and roof drain strainer in Prattville, AL and each one is a specific approach to the wide range of roof styles and their drainage challenges. You need to take into consideration the kind of roof, its size, and its roof pitch to be able to choose the most suitable drain. You also should think about the location of the drain, how much rainwater is anticipated and safety when selecting a roof water drain for a residence or commercial structure.

Gambrel, dormers, hip and gable roofs shed rainwater water due to gravity. Flat roofs, on the other hand, accumulate rain water. Until this water is routed out and away from the flat roof structure, it will most likely develop pools of water that could inevitably leak and the accumulated weight will eventually cause compromising the integrity of the structure. That is the reason that roofs with a pitch of less than two percent ought to have roof drains situated at the lowest places on the roof in which water puddles and should be uniformly spread all throughout the roof top.

Roof Drain Types


There are several different alternatives of roof drains. They generally fall into 2 categories: pitched roof drains and flat roof drains. Pitched roof drains usually comprise gutters that collect rainwater which travels via gravity to the roof periphery. Gutters direct this water in the direction of 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 Drain Scuppers


Scuppers are situated on the roof's periphery. They can also be placed 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 hook up to a downspout, or could be lengthened so that water is guided off of the building sides and foundation.

Inner Roof Drains


There are quite a few different kinds of inner drains for flat roofs. They are installed at low places in the roof and attach to inner drainage pipes that drive water outside or into a sewer system. Several versions of internal roof drains have domes, strainers or covers which prevent debris from clogging the roof drain pipe. These types of drains work via gravitational force channeling pooling water through the roof drain system. They are made from PVC, cast iron or cast aluminum.

Siphonic Roof Drains

Siphonic roof drains are a more efficient 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 creates a siphonic drain which eliminates air from the system and allows for smaller pipe diameters . When all of the air is eliminated, a negative air pressure in the tail portion of the drain is established which pulls 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 strainer in and around Prattville, Alabama, give us a call. We'd be glad to help.