Roof Drains


At this time there are several distinct kinds of roof drains and roof drain scupper in Hartselle, AL and each is a specific solution to the variety of roof styles and their drainage challenges. You must consider the type of roof, its dimensions, and the roof pitch to be able to select the most suitable drain. You also need to take into account the location of the drain, how much rainwater is expected and safety when choosing a roof water drain for a residence or commercial structure.

Hip roofs, dormers, gable and mansard roofs shed water due to gravitational force. Flat roofs, on the other hand, accumulate water. Unless this water is guided out and away from the flat roof , it will develop pools of water that could eventually leak and the amassed weight may eventually cause damage to the structure. That is why roofs with a pitch of below 2% should have roof drains situated in the lowest spots on the roof in which water puddles and should be uniformly spread all throughout the roof surface.

Roof Drain Kinds


There are a number of distinct variations of roof drains. They basically fall into 2 categories: flat roof drains and pitched roof drains. Pitched roof rainwater drains normally comprise gutters which collect rainwater that travels via gravity to the roof edge. Gutters channel this water in the direction of downspouts which route the water flow down and away from the building or in to sewer lines. Flat roof drains can be one of three main types: scuppers, inner drains or siphonic drains.

Roof Drain Scuppers


Scuppers are located on a roof's perimeter. They can also be put in on a balcony or terrace. Small openings are cut in the side of the roof structure so rain water can empty and drain the roof surface. Scuppers can hook up to a downspout, or can be lengthened to make sure that water is directed away from the building sides and foundation.

Interior Roof Drains


There are quite a few different kinds of inner drains for flat roofs. These are installed at low spots in the roof and attach to interior drainage pipes that route water outside or in to a sewer system. Several designs of inner roof drains have domes, strainers or covers which keep trash from obstructing the roof drain pipe. These kinds of drains operate via gravitational force channeling 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 efficient substitute for gravity drainage. Conventional flat roof drainage allows both air and water to go into 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 removes air from the system and allows for 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 water off the roof siphonically. Although 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 scupper in and around Hartselle, Alabama, give us a call. We'd be glad to help.