Roof Drains


At this time there are a number of distinct kinds of roof water drains and roof drain scupper in Jasper, AL and each one is an unique answer to the variety of roof styles and their drainage concerns. You should consider the type of roof, its size, and its roof pitch to be able to choose the correct drain. You also may want to take into consideration the site of the drain, what amount of rainwater is anticipated and safe practices when selecting a roof drain for a house or business structure.

Hip roofs, dormers, gable and mansard roofs shed rainwater water thanks to gravitational force. Flat roofs, alternatively, accumulate rain water. Unless the water is directed out and away from the roof structure, it will most likely create pools of water that may eventually leak and the accumulated weight will eventually result in structural damage. That is why roofs with a pitch of less than 2% ought to have roof drains located at the lowest areas on the roof where water puddles and should be evenly spaced all throughout the roof top.

Kinds of Roof Drains


There are several distinct variations of roof drains. They basically fall into 2 categories: pitched roof drains and flat roof drains. Pitched roof rainwater drains usually consist of gutters that collect rainwater that travels by means of gravity down to the roof edge. Gutters channel this water towards downspouts which steer the water flow down and away from the structure or into 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 periphery. Scuppers can also be placed on a balcony or terrace. Small openings are cut into the side of the roof structure so that rain water can flow out and drain the roof top. Scuppers can hook up to a downspout, or could be extended so that water is guided away from the building sides and foundation.

Interior Roof Drains


There are many kinds of inner drains for flat roofs. They are installed at low spots on the roof and connect to inner drainage pipes that route water outdoors or in to a sewer system. Several designs of internal roof drains have domes, strainers or covers that prevent debris from obstructing the roof drain pipe. These types of drains work via gravity channeling pooling water thru the roof drain system. They can be made of PVC, cast iron or cast aluminum.

Siphonic Roof Drains

Siphonic roof drains are a more effective alternative to gravity drainage. Traditional flat roof drainage allows 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 system it creates a siphonic drain that removes air from the system and permits smaller sized pipe diameters . When all air is removed, a negative air pressure in the tail piece of the drain is set up which draws water off the roof siphonically. Although used primarily for flat roofs, siphonic drains can also be installed on angled roofs.

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