Roof Drains


At this time there are a number of different varieties of roof water drains and roof drain system in Jacksonville, AL and each is an unique approach to the wide range of roof styles and their drainage concerns. You should consider the type of roof, its dimensions, and the roof pitch to be able to pick the right drain. You also need to think about the location of the drain, how much rainwater is anticipated and safety when selecting a roof drain for a house or business structure.

Hip roofs, dormers, gable and mansard roofs shed rainwater water due to gravitational force. Flat roofs, on the other hand, accumulate water. Unless the water is routed out and away from the roof , it will create pools that may eventually leak and the amassed weight will subsequently cause compromising the integrity of the structure. That is why roofs with a slope of under 2% ought to have roof drains positioned in the lowest areas on the roof where water puddles and need to be uniformly spread throughout the roof top.

Roof Drain Types


There are a number of different variations of roof drains. They generally fall into 2 groups: pitched roof drains and flat roof drains. Pitched roof drains normally comprise gutters which accumulate rainwater which passes by means of gravity down to the roof periphery. Gutters direct this water in the direction of downspouts which route the water flow down and far away from the structure or into sewers. Flat roof drains are one of three primary types: scuppers, inner drains or siphonic drains.

Roof Rainwater Drain Scuppes


Scuppers are situated 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 flow out and drain the roof top. Scuppers can hook up to a downspout, or could be lengthened to make sure that water is guided away from the building sides and foundation.

Interior Roof Drains


There are quite a few different kinds of inner drains for flat roofs. They are installed at low areas on the roof and connect to inner drainage pipes that route water outdoors or into a sewer system. Many styles of inner roof drains have domes, strainers or covers that keep trash from obstructing the roof drain pipe. These types of drains operate via gravity funneling pooling water through the roof drain system. They are made from PVC, cast iron or cast aluminum.

Siphonic Roof Drains

Siphonic roof drains are a more efficient alternative to gravity drainage. Traditional flat roof drainage allows both air and water to enter the drain system producing pipe space which is occupied by both air and water. By incorporating an engineered baffle to the sump of the drain body it produces a siphonic drain which eliminates air from the system and allows for smaller sized pipe diameters . When all air is eliminated, a negative air pressure in the tail portion of the drain is established which draws water 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 system in and around Jacksonville, Alabama, give us a call. We'd be glad to help.