Roof Drains


There are several different types of roof drains and roof drain strainer in Fairfield, AL and each one is a specific approach to the variety of roof styles and their drainage challenges. You should look at the type of roof, its size, and its roof pitch to be able to choose the correct drain. You also should think about the location of the drain, how much rainwater is expected and safe practices when choosing a roof drain for a house or commercial structure.

Gambrel, dormers, hip and gable roofs shed water because of gravitational force. Flat roofs, alternatively, collect rain water. Unless the water is directed out and away from the roof , it will create pools that could eventually 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 situated at the lowest places on the roof where water pools and need to be evenly spread all throughout the roof top.

Types of Roof Drains


There are several different alternatives of roof drains. They generally fall into two categories: flat roof drains and pitched roof drains. Pitched roof rainwater drains normally comprise gutters that accumulate rainwater that passes via gravity to the roof edge. Gutters channel this water in the direction of downspouts which steer 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 located on the roof's periphery. Scuppers can also be placed on a balcony or terrace. Small openings are cut into the side of the roof structure so water can flow out and drain the roof surface. Scuppers can connect to a downspout, or could be lengthened so that water is guided off of the building sides and foundation.

Inner Roof Drains


There are quite a few different types of inner drains for flat roofs. They are positioned at low spots in the roof and connect to interior drainage pipes that route water outdoors or in to a sewer system. Many 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 pooling water through 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. Standard flat roof drainage allows both air and water to enter the drain system producing 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 eliminates air from the system and permits smaller sized pipe diameters . When all of the air is removed, a negative air pressure in the tail portion of the drain is established which attracts rainwater off the roof siphonically. Though used primarily for flat roofs, siphonic drains can also be installed on pitched roofs.

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