Roof Drains


At this time there are several distinct kinds of roof drains and roof drain scupper in Mobile, AL and each one is an unique solution to the variety of roof styles and their drainage issues. You should think about the kind of roof, its dimensions, and its roof pitch to be able to choose the correct drain. You also may want to think about the location of the drain, what amount of rainwater is expected and safe practices when choosing a roof water drain for a house or commercial building.

Hip roofs, dormers, gable and mansard roofs shed water thanks to gravitational force. Flat roofs, alternatively, collect water. Unless the water is directed out and away from the roof structure, it will most likely create pools that may inevitably leak and the accumulated weight may subsequently result in structural damage. That is the reason that roofs with a slope of less than two percent ought to have roof drains located in the lowest spots on the roof where water puddles and should be evenly spaced throughout the roof surface.

Roof Drain Types


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

Roof Rainwater Drain Scuppes


Scuppers are situated on the roof's perimeter. Scuppers can also be placed on a balcony or terrace. Small openings are cut into the side of the roof structure so water can empty and drain the roof top. Scuppers can attach to a downspout, or could be extended to make sure that water is directed away from the building sides and foundation.

Interior Roof Drains


There are many kinds of inner drains for flat roofs. These are positioned at low spots in the roof and attach to interior drainage pipes that drive water outside or in to a sewer system. Several styles of inner roof drains have domes, strainers or covers that keep trash from blocking the roof drain pipe. These types of drains work via gravitational force funneling 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 effective alternative to gravity drainage. Conventional flat roof drainage allows both air and water to enter the drain system creating pipe space which is 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 to be used. When all of the air is removed, 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 pitched roofs.

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