Roof Drains


At this time there are several distinct types of roof drains and roof drain dome in Dothan, AL and each one is an unique approach to the variety of roof types and their drainage challenges. You need to look at the kind of roof, its size, and its roof pitch to be able to pick the most suitable drain. You also need to think about the location of the drain, what amount of rainwater is anticipated and safe practices when choosing a roof water drain for a house or commercial structure.

Gambrel, dormers, hip and gable roofs shed water because of gravity. Flat roofs, alternatively, accumulate water. Unless the water is guided out and away from the flat roof , it will develop pools of water that could inevitably leak and the accumulated weight will eventually result in compromising the integrity of the structure. That is the reason that roofs with a slope of below two percent ought to have roof drains located in the lowest places on the roof in which water pools and need to be uniformly spread throughout the roof surface.

Types of Roof Drains


There are a number of distinct alternatives of roof drains. They basically fall into 2 groups: flat roof drains and pitched roof drains. Pitched roof rainwater drains usually consist of gutters which collect rainwater that passes via gravity to the roof periphery. Gutters channel this water in the direction of downspouts which route the water flow down and far away from the structure or into sewers. Flat roof drains can be one of three primary types: scuppers, inner drains or siphonic drains.

Roof Rainwater Drain Scuppes


Scuppers are situated 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 water can flow out and drain the roof surface. Scuppers can connect to a downspout, or could be extended 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. These are installed at low spots in the roof and attach to inner drainage pipes that drive water outdoors or into a sewer system. Many models of inner roof drains have domes, strainers or covers that keep debris from obstructing the roof drain pipe. These types of drains work via gravitational force funneling standing water thru the roof drain system. They are constructed from PVC, cast iron or cast aluminum.

Siphonic Roof Drains

Siphonic roof drains are a more effective substitute for gravity drainage. Traditional flat roof drainage allows both air and water to enter the drain system creating pipe space which is occupied by both air and water. By adding an engineered baffle to the sump of the drain body it produces a siphonic drain that removes air from the system and permits smaller sized pipe diameters . When all air is eliminated, a negative air pressure in the tail portion of the drain is set up which pulls rainwater off the roof siphonically. Although used primarily for flat roofs, siphonic drains can also be set up on pitched roofs.

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