Roof Drains


At this time there are a number of different varieties of roof water drains and roof drain strainer in Montevallo, AL and each one is a specific solution to the variety of roof styles and their drainage concerns. You need to consider the type of roof, its size, and the roof pitch to be able to choose the correct drain. You also should think about the location of the drain, how much rainwater is anticipated and safety when choosing a roof water drain for a home or business building.

Hip roofs, dormers, gable and mansard roofs shed water due to gravitational force. Flat roofs, conversely, collect water. Unless this water is routed out and away from the flat roof , it will develop pools of water that could inevitably leak and the amassed weight will eventually result in compromising the integrity of the structure. That is the reason that roofs with a slope of under 2% should have roof drains situated in the lowest areas on the roof in which water puddles and need to be uniformly spaced all throughout the roof surface.

Roof Drain Kinds


There are a number of distinct alternatives of roof drains. They basically fall into 2 categories: pitched roof drains and flat roof drains. Pitched roof drains usually consist of gutters which accumulate rainwater which travels by means of gravity down to the roof edge. Gutters transport this water in the direction of downspouts which steer the water flow down and away from the building or in to sewers. Flat roof drains can be one of three primary types: scuppers, inner drains or siphonic drains.

Roof Drain Scuppers


Scuppers are located on the roof's perimeter. Scuppers can also be installed on a balcony or terrace. Small openings are cut in the side of the roof structure so rain water can flow out and drain the roof top. Scuppers can hook up to a downspout, or can be lengthened so that water is directed away from the structure sides and foundation.

Interior Roof Drains


There are quite a few different kinds of inner drains for flat roofs. They are positioned at low areas on the roof and attach to interior drainage pipes that direct water outside or in to a sewer system. Several designs of inner roof drains have domes, strainers or covers that prevent trash from blocking the roof drain pipe. These types of drains work via gravitational force channeling standing 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 effective substitute for gravity drainage. Standard flat roof drainage permits 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 body it creates a siphonic drain which eliminates air from the system and permits smaller sized pipe diameters . When all of the air is removed, a negative air pressure in the tail portion of the drain is established which draws water off the roof siphonically. Though 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 roof drain strainer in and around Montevallo, Alabama, give us a call. We'd be glad to help.