Roof Drains


There are a number of different types of roof water drains and roof drain dome in Hartselle, AL and each one is an unique approach to the variety of roof types and their drainage issues. You should look at the type of roof, its size, and the roof pitch to be able to pick the most suitable drain. You also need to think about the site of the drain, how much rainwater is expected and safe practices when selecting a roof water drain for a house or commercial building.

Gable, dormer, mansard and hip roofs shed rainwater water because of gravity. Flat roofs, conversely, accumulate water. Unless this water is directed out and away from the flat roof structure, it will develop pools of water that may inevitably leak and the amassed weight may subsequently result in damage to the structure. 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 in which water pools and should be uniformly spread throughout the roof surface.

Types of Roof Drains


There are a number of different alternatives of roof drains. They generally fall into 2 categories: flat roof drains and pitched roof drains. Pitched roof drains usually consist of gutters which accumulate rainwater which travels by means of gravity to the roof edge. Gutters direct this water in the direction of downspouts which direct the water flow down and away from the building or into 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 perimeter. Scuppers can also be put in on a balcony or terrace. Small openings are cut in the side of the roof structure so water can empty and drain the roof surface. Scuppers can attach to a downspout, or could be lengthened so that water is guided off of the structure sides and foundation.

Inner Roof Drains


There are many types of inner drains for flat roofs. They are installed at low spots on the roof and attach to inner drainage pipes that direct water outside or into a sewer system. Many styles 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 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 permits both air and water to go into 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 produces a siphonic drain which removes air from the system and permits smaller pipe diameters . When all of the air is removed, a negative air pressure in the tail piece of the drain is set up which draws water off the roof siphonically. Although 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 dome in and around Hartselle, Alabama, give us a call. We'd be glad to help.