Roof Drains


At this time there are a number of different kinds of roof drains and roof drain scupper in Oxford, AL and each is an unique approach to the wide range of roof styles and their drainage challenges. You need to think about the type of roof, its size, and its roof pitch to be able to pick the most suitable drain. You also should take into consideration the location of the drain, what amount of rainwater is anticipated and safe practices when choosing 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, alternatively, accumulate rain water. Unless the water is guided out and away from the roof , it will most likely develop pools of water that could inevitably leak and the accumulated weight may eventually result in damage to the structure. That is the reason that roofs with a pitch of below 2% should have roof drains positioned at the lowest places on the roof where water pools and should be evenly spaced all throughout the roof surface.

Roof Drain Kinds


There are several distinct variations of roof drains. They generally fall into 2 groups: pitched roof drains and flat roof drains. Pitched roof rainwater drains usually comprise gutters which accumulate rainwater which travels via gravity to the roof periphery. Gutters direct 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 can be one of three primary types: scuppers, inner drains or siphonic drains.

Roof Rainwater Drain Scuppes


Scuppers are situated on the roof's periphery. Scuppers can also be installed 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 surface. Scuppers can attach to a downspout, or could be lengthened so that water is guided away from the building sides and foundation.

Inner Roof Drains


There are many types of inner drains for flat roofs. These are installed at low places in the roof and attach to inner drainage pipes that direct water outdoors or into a sewer system. Many models of internal roof drains have domes, strainers or covers which keep trash from obstructing the roof drain pipe. These kinds of drains work via gravitational force channeling pooling water through the roof drain system. They can be made of PVC, cast iron or cast aluminum.

Siphonic Roof Drains

Siphonic roof drains are a more efficient substitute for gravity drainage. Conventional flat roof drainage permits both air and water to go into the drain system creating 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 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 water off the roof siphonically. Though used primarily 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 scupper in and around Oxford, Alabama, give us a call. We'd be glad to help.