Roof Drains


At this time there are several distinct varieties of roof water drains and roof drain pvc in Phenix City, AL and each one is a specific approach to the variety of roof styles and their drainage issues. You must consider the kind of roof, its size, and the roof pitch to be able to select the most suitable drain. You also may want to think about the location of the drain, how much rainwater is anticipated and safe practices when choosing a roof water drain for a residence or business building.

Gable, dormer, mansard and hip roofs shed rainwater water thanks to gravitational force. Flat roofs, on the other hand, collect water. Until the water is routed out and away from the flat roof , it will most likely develop pools that may inevitably leak and the amassed weight will eventually result in compromising the integrity of the structure. That is the reason that roofs with a slope of less than 2% should have roof drains located at the lowest spots on the roof in which water pools and need to be uniformly spread all throughout the roof top.

Roof Drain Types


There are several different alternatives of roof drains. They generally fall into two groups: flat roof drains and pitched roof drains. Pitched roof rainwater drains normally consist of gutters that collect rainwater that passes by means of gravity down to the roof edge. Gutters direct this water in the direction of downspouts which steer the water flow down and away from the building or in to sewer lines. Flat roof drains can be one of three main types: scuppers, inner drains or siphonic drains.

Roof Rainwater Drain Scuppes


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

Inner Roof Drains


There are quite a few different types of inner drains for flat roofs. They are installed at low areas on the roof and connect to interior drainage pipes that direct water outside or in to a sewer system. Many models of internal roof drains have domes, strainers or covers which prevent trash from obstructing the roof drain pipe. These types of drains work via gravitational force channeling standing 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 alternative to gravity drainage. Standard flat roof drainage permits both air and water to enter the drain system creating pipe space occupied by both air and water. By incorporating an engineered baffle to the sump of the drain system it creates a siphonic drain which eliminates air from the system and permits smaller pipe diameters . When all air is eliminated, a negative air pressure in the tail portion of the drain is set up which draws rainwater off the roof siphonically. Although 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 pvc in and around Phenix City, Alabama, give us a call. We'd be glad to help.