Roof Drains


There are several distinct kinds of roof drains and roof drain scupper in Attalla, AL and each one is a specific solution to the wide range of roof styles and their drainage challenges. You must think about the kind of roof, its dimensions, and the roof pitch to be able to select the most suitable drain. You also need to think about the location of the drain, how much rainwater is anticipated and safe practices when selecting a roof water drain for a home or business structure.

Gambrel, dormers, hip and gable roofs shed water because of gravitational force. Flat roofs, alternatively, accumulate rain water. Unless the water is routed out and away from the flat roof structure, it will create pools of water that may inevitably leak and the amassed weight will subsequently cause structural damage. That is why roofs with a slope of under two percent should have roof drains located in the lowest places on the roof where water puddles and need to be evenly spaced all throughout the roof surface.

Roof Drain Kinds


There are several different alternatives of roof drains. They basically fall into two categories: pitched roof drains and flat roof drains. Pitched roof rainwater drains usually consist of gutters that accumulate rainwater that passes via 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 sewer lines. Flat roof drains are one of three primary types: scuppers, inner drains or siphonic drains.

Roof Rainwater Drain Scuppes


Scuppers are located on a 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 water can empty and drain the roof top. Scuppers can attach to a downspout, or can be lengthened so that water is guided away from the building sides and foundation.

Inner Roof Drains


There are many types of inner drains for flat roofs. These are installed at low spots in the roof and connect to interior drainage pipes that route water outside or into a sewer system. Several styles of internal roof drains have domes, strainers or covers that prevent trash from blocking the roof drain pipe. These types of drains operate via gravitational force channeling pooling water through the roof drain system. They can be constructed from PVC, cast iron or cast aluminum.

Siphonic Roof Drains

Siphonic roof drains are a more efficient alternative to gravity drainage. Standard 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 adding an engineered baffle to the sump of the drain body it creates a siphonic drain which removes air from the system and permits smaller pipe diameters . When all 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 scupper in and around Attalla, Alabama, give us a call. We'd be glad to help.