Roof Drains


At this time there are a few distinct kinds of roof water drains and roof drain pipe in Phenix City, AL and each is an unique approach to the variety of roof styles and their drainage challenges. You should look at the type of roof, its size, and its roof pitch to be able to choose the most suitable drain. You also may want to take into account the site of the drain, how much rainwater is anticipated and safety when selecting a roof drain for a home or commercial structure.

Gambrel, dormers, hip and gable roofs shed water due to gravitational force. Flat roofs, alternatively, collect water. Until this water is guided out and away from the roof , it will most likely create pools of water that could inevitably leak and the accumulated weight will eventually cause structural damage. That is the reason that roofs with a pitch of below 2% ought to have roof drains situated in the lowest spots on the roof in which water pools and should be evenly spread all throughout the roof surface.

Roof Drain Types


There are a number of different variations of roof drains. They generally fall into 2 categories: flat roof drains and pitched roof drains. Pitched roof drains normally comprise gutters which accumulate rainwater which travels by means of gravity down to the roof edge. Gutters transport this water in the direction of downspouts which steer the water flow down and far away from the building or into sewer lines. Flat roof drains can be one of three main types: scuppers, inner drains or siphonic drains.

Roof Rainwater Drain Scuppes


Scuppers are situated on the roof's periphery. They can also be installed on a balcony or terrace. Small openings are cut in the side of the roof structure so that water can flow out and drain the roof top. Scuppers can connect to a downspout, or could be extended to make sure that water is guided away from the structure sides and foundation.

Inner Roof Drains


There are many kinds of inner drains for flat roofs. These are positioned at low spots in the roof and connect to inner drainage pipes that direct water outside or in to a sewer system. Several styles of inner roof drains have domes, strainers or covers that prevent trash from obstructing the roof drain pipe. These types of drains operate via gravity channeling pooling water thru the roof drain system. They can be constructed from PVC, cast iron or cast aluminum.

Siphonic Roof Drains

Siphonic roof drains are a more effective substitute for gravity drainage. Conventional flat roof drainage permits both air and water to enter the drain system producing 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 that removes air from the system and allows for smaller sized pipe diameters . When all of the air is eliminated, a negative air pressure in the tail portion of the drain is set up which draws rainwater off the roof siphonically. Though used mainly for flat roofs, siphonic drains can also be installed on angled roofs.

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