Roof Drains


At this time there are a number of different types of roof water drains and roof drain cover in Saraland, AL and each one is an unique approach to the wide range of roof styles and their drainage challenges. You must consider the kind of roof, its size, and its 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 expected and safe practices when selecting a roof drain for a house or business building.

Gambrel, dormers, hip and gable roofs shed water due to gravitational force. Flat roofs, conversely, accumulate water. Until the water is directed out and away from the flat roof structure, it will create pools of water that could eventually leak and the amassed weight will subsequently result in structural damage. That is the reason that roofs with a slope of less than two percent ought to have roof drains located in the lowest spots on the roof where water puddles and need to be evenly spaced all throughout the roof surface.

Roof Drain Types


There are a number of distinct variations of roof drains. They basically fall into 2 groups: flat roof drains and pitched roof drains. Pitched roof drains usually consist of gutters which accumulate rainwater which passes by means of gravity to the roof periphery. Gutters direct this water towards downspouts which steer the water flow down and far away from the structure 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 put in on a balcony or terrace. Small holes are cut into the side of the roof structure so that water can empty and drain the roof top. 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.

Interior Roof Drains


There are many types of inner drains for flat roofs. They are installed at low places on the roof and connect to inner drainage pipes that route water outside or in to a sewer system. Several versions of internal 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 thru the roof drain system. They can be made from PVC, cast iron or cast aluminum.

Siphonic Roof Drains

Siphonic roof drains are a more effective substitute for gravity drainage. Conventional flat roof drainage permits both air and water to enter the drain system producing pipe space occupied by both air and water. By adding an engineered baffle to the sump of the drain system it produces a siphonic drain that eliminates air from the system and permits smaller sized pipe diameters . When all 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 pitched roofs.

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