Roof Drains


There are a few distinct types of roof water drains and roof drain pvc in Clanton, AL and each is a specific approach to the wide range of roof types and their drainage challenges. You need to think about the kind of roof, its size, and the roof pitch to be able to pick the correct drain. You also should think about the site of the drain, how much rainwater is expected and safe practices when choosing a roof water drain for a residence or commercial building.

Gambrel, dormers, hip and gable roofs shed water because of gravitational force. Flat roofs, conversely, accumulate water. Unless this water is directed out and away from the roof structure, it will most likely develop pools of water that may eventually leak and the accumulated weight may eventually result in damage to the structure. That is why roofs with a pitch of less than two percent ought to have roof drains situated at the lowest areas on the roof where water puddles and need to be uniformly spread all throughout the roof top.

Types of Roof Drains


There are a number of distinct alternatives of roof drains. They basically fall into two categories: flat roof drains and pitched roof drains. Pitched roof rainwater drains normally consist of gutters which collect rainwater which travels via gravity to the roof edge. Gutters direct this water towards downspouts which steer the water flow down and far away from the building or in to sewers. Flat roof drains are one of three main types: scuppers, inner drains or siphonic drains.

Roof Rainwater Drain Scuppes


Scuppers are situated on the roof's periphery. Scuppers can also be placed on a balcony or terrace. Small holes are cut into 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 to make sure that water is directed off of the building sides and foundation.

Inner Roof Drains


There are quite a few different types of inner drains for flat roofs. These are installed at low spots on the roof and attach to interior drainage pipes that drive water outdoors or in to a sewer system. Many versions of inner roof drains have domes, strainers or covers which prevent trash from obstructing the roof drain pipe. These types of drains work via gravitational force funneling pooling water thru the roof drain system. They are made from PVC, cast iron or cast aluminum.

Siphonic Roof Drains

Siphonic roof drains are a more effective alternative to gravity drainage. Traditional flat roof drainage permits both air and water to go into the drain system creating pipe space occupied by both air and water. By incorporating an engineered baffle to the sump of the drain body it creates a siphonic drain which removes air from the system and permits smaller sized pipe diameters to be used. When all air is eliminated, a negative air pressure in the tail piece of the drain is established which attracts water off the roof siphonically. Though used mainly 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 pvc in and around Clanton, Alabama, give us a call. We'd be glad to help.