Roof Drains


There are several different types of roof drains and roof drain pipe in Clanton, AL and each is a specific approach to the wide range of roof styles and their drainage concerns. You should take into consideration the type of roof, its size, and the roof pitch to be able to select the most suitable drain. You also need to take into consideration the site of the drain, what amount of rainwater is anticipated and safety when selecting a roof water drain for a residence or business building.

Hip roofs, dormers, gable and mansard roofs shed water thanks to gravitational force. Flat roofs, alternatively, accumulate water. Until this water is guided out and away from the roof structure, it will most likely create pools that could inevitably leak and the amassed weight will subsequently result in structural damage. That is why roofs with a slope of below 2% should have roof drains located in the lowest places on the roof where water puddles and need to be uniformly spread all throughout the roof surface.

Types of Roof Drains


There are a number of different alternatives of roof drains. They generally fall into two groups: pitched roof drains and flat roof drains. Pitched roof rainwater drains normally consist of gutters which accumulate rainwater that travels by means of gravity to the roof periphery. Gutters channel this water towards downspouts which steer the water flow down and far away from the structure or in to sewers. Flat roof drains can be one of three main types: scuppers, inner drains or siphonic drains.

Roof Rainwater Drain Scuppes


Scuppers are located on a roof's perimeter. Scuppers can also be placed on a balcony or terrace. Small holes are cut in the side of the roof structure so that water can empty and drain the roof top. Scuppers can connect to a downspout, or can be lengthened to make sure that water is guided off of the structure sides and foundation.

Interior Roof Drains


There are many types of inner drains for flat roofs. These are installed at low places in the roof and connect to inner drainage pipes that drive water outside or in to a sewer system. Many designs of inner roof drains have domes, strainers or covers which prevent trash from blocking the roof drain pipe. These types of drains operate via gravitational force channeling pooling water thru the roof drain system. They are made of PVC, cast iron or cast aluminum.

Siphonic Roof Drains

Siphonic roof drains are a more efficient alternative to gravity drainage. Traditional 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 produces a siphonic drain which removes air from the system and permits smaller pipe diameters . When all of the air is eliminated, a negative air pressure in the tail piece of the drain is established which attracts rainwater 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 pipe in and around Clanton, Alabama, give us a call. We'd be glad to help.