Roof Drains


There are a few distinct types of roof water drains and roof drain pvc in Attalla, AL and each one is a specific answer to the variety of roof types and their drainage challenges. You need to take into consideration the type of roof, its size, and its roof pitch to be able to select the correct drain. You also need to think about the site of the drain, how much rainwater is expected and safety when selecting a roof drain for a home or commercial structure.

Hip roofs, dormers, gable and mansard roofs shed water thanks to gravity. Flat roofs, on the other hand, accumulate rain water. Unless the water is guided out and away from the flat roof structure, it will most likely create pools that may inevitably leak and the amassed weight may eventually result in compromising the integrity of the structure. That is the reason that roofs with a slope of under 2% should have roof drains located at the lowest places on the roof where water puddles and need to be evenly spread throughout the roof top.

Roof Drain Kinds


There are a number of different alternatives of roof drains. They generally fall into 2 groups: pitched roof drains and flat roof drains. Pitched roof rainwater drains usually consist of gutters which accumulate rainwater that passes via gravity to the roof edge. Gutters channel this water towards downspouts which steer the water flow down and far away from the structure or in to sewer lines. Flat roof drains can be one of three primary types: scuppers, inner drains or siphonic drains.

Roof Drain Scuppers


Scuppers are situated on a roof's perimeter. They can also be put in on a balcony or terrace. Small holes are cut into the side of the roof structure so rain water can empty and drain the roof top. Scuppers can connect to a downspout, or could be extended to make sure that water is guided off of the building sides and foundation.

Inner Roof Drains


There are many kinds of inner drains for flat roofs. They are installed at low spots in the roof and connect to interior drainage pipes that drive water outdoors or in to a sewer system. Many models of inner roof drains have domes, strainers or covers that prevent trash from clogging the roof drain pipe. These types of drains operate via gravity funneling 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 substitute for gravity drainage. Standard flat roof drainage allows 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 permits smaller sized pipe diameters . 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 angled roofs.

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