Roof Drains


At this time there are a few distinct varieties of roof drains and roof drain pvc in Dothan, AL and each one is an unique answer to the wide range of roof styles and their drainage issues. You must look at the kind of roof, its size, and the roof pitch to be able to pick the most suitable drain. You also may want to take into account the location of the drain, what amount of rainwater is expected and safety when selecting a roof water drain for a house or commercial building.

Gambrel, dormers, hip and gable roofs shed water due to gravity. Flat roofs, alternatively, accumulate water. Until the water is guided out and away from the roof structure, it will develop pools 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 below 2% ought to have roof drains located in the lowest areas on the roof in which water puddles and need to be uniformly spaced throughout the roof top.

Roof Drain Kinds


There are a number of different alternatives of roof drains. They basically fall into 2 categories: pitched roof drains and flat roof drains. Pitched roof drains usually comprise gutters which accumulate rainwater which passes by means of gravity down to the roof edge. Gutters channel this water in the direction of downspouts which direct the water flow down and away from the structure 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 situated on a roof's perimeter. They can also be installed on a balcony or terrace. Small holes are cut in the side of the roof structure so that water can flow out and drain the roof surface. Scuppers can hook up to a downspout, or can be extended to make sure that water is guided off of the structure sides and foundation.

Inner Roof Drains


There are many kinds of inner drains for flat roofs. They are installed at low spots on the roof and connect to interior drainage pipes that route water outdoors or in to a sewer system. Several models of internal roof drains have domes, strainers or covers which prevent debris from obstructing the roof drain pipe. These types of drains operate via gravity channeling standing water through the roof drain system. They are made of 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 go into the drain system producing pipe space occupied by both air and water. By adding an engineered baffle to the sump of the drain body it creates a siphonic drain which removes air from the system and allows for smaller pipe diameters to be used. When all air is removed, a negative air pressure in the tail portion of the drain is set up which pulls 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 pvc in and around Dothan, Alabama, give us a call. We'd be glad to help.