Roof Drains


There are a number of distinct varieties of roof water drains and roof drain system in Prattville, AL and each one is a specific solution to the variety of roof types and their drainage challenges. You need to think about the kind of roof, its dimensions, and the roof pitch to be able to select the right drain. You also may want to take into consideration the location of the drain, how much rainwater is expected and safety when choosing a roof drain for a residence or commercial building.

Gambrel, dormers, hip and gable roofs shed water because of gravity. Flat roofs, on the other hand, collect rain water. Unless the water is routed out and away from the roof , it will most likely create pools that could inevitably leak and the accumulated weight will eventually cause structural damage. That is the reason that roofs with a slope of under 2% ought to have roof drains located at the lowest areas on the roof where water puddles and should be evenly spaced throughout the roof top.

Roof Drain Kinds


There are several different alternatives of roof drains. They generally fall into 2 groups: flat roof drains and pitched roof drains. Pitched roof rainwater drains normally comprise gutters that accumulate rainwater that passes via gravity down to the roof edge. Gutters channel this water in the direction of downspouts which direct the water flow down and far away from the structure or in to sewer lines. Flat roof drains can be one of three primary types: scuppers, inner drains or siphonic drains.

Roof Rainwater Drain Scuppes


Scuppers are situated on a roof's periphery. They can also be placed on a balcony or terrace. Small openings are cut into the side of the roof structure so rain water can flow out and drain the roof surface. Scuppers can attach to a downspout, or could be lengthened to make sure that water is guided away from the building sides and foundation.

Inner Roof Drains


There are many kinds of inner drains for flat roofs. These are positioned at low spots on the roof and connect to inner drainage pipes that direct water outside or into a sewer system. Many styles of inner roof drains have domes, strainers or covers that keep debris from blocking the roof drain pipe. These kinds of drains work via gravitational force funneling standing water through the roof drain system. They can be made from PVC, cast iron or cast aluminum.

Siphonic Roof Drains

Siphonic roof drains are a more efficient substitute for gravity drainage. Standard flat roof drainage permits both air and water to go into the drain system creating pipe space occupied by both air and water. By adding an engineered baffle to the sump of the drain body it produces a siphonic drain that removes air from the system and allows for smaller pipe diameters . When all air is removed, a negative air pressure in the tail piece of the drain is set up which draws rainwater off the roof siphonically. Though used mainly for flat roofs, siphonic drains can also be set up on pitched roofs.

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