Roof Drains


At this time there are several distinct types of roof water drains and roof drain pvc in Hartselle, AL and each one is an unique approach to the variety of roof types and their drainage issues. You need to think about the kind of roof, its size, and the roof pitch to be able to select the right drain. You also should think about the site of the drain, how much rainwater is anticipated and safe practices when selecting a roof drain for a house or business building.

Hip roofs, dormers, gable and mansard roofs shed water because of gravitational force. Flat roofs, alternatively, collect rain water. Until the water is guided out and away from the roof , it will most likely develop pools of water that may inevitably leak and the amassed weight may eventually cause compromising the integrity of the structure. That is why roofs with a pitch of below two percent should have roof drains positioned at the lowest places on the roof where water puddles and need to be uniformly spaced throughout the roof top.

Roof Drain Kinds


There are a number of different variations of roof drains. They generally fall into two categories: pitched roof drains and flat roof drains. Pitched roof rainwater drains normally consist of gutters which accumulate rainwater that passes by means of gravity to the roof edge. Gutters transport this water towards downspouts which direct the water flow down and away from the structure or in to sewers. 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 put in 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 surface. Scuppers can connect to a downspout, or could be lengthened to make sure that water is guided off of the structure sides and foundation.

Inner Roof Drains


There are quite a few different kinds of inner drains for flat roofs. They are installed at low spots on 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 debris from clogging the roof drain pipe. These kinds of drains operate via gravity channeling pooling water through the roof drain system. They are constructed from PVC, cast iron or cast aluminum.

Siphonic Roof Drains

Siphonic roof drains are a more effective alternative to gravity drainage. Standard 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 incorporating an engineered baffle to the sump of the drain system it produces a siphonic drain that eliminates air from the system and allows for smaller sized pipe diameters . When all air is eliminated, a negative air pressure in the tail portion of the drain is set up which pulls water off the roof siphonically. Although used primarily for flat roofs, siphonic drains can also be set up on angled roofs.

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