Roof Drains


There are several distinct types of roof drains and roof drain strainer in Anniston, AL and each one is an unique answer to the wide range of roof styles and their drainage issues. You must think about the kind of roof, its dimensions, and its roof pitch to be able to pick the right drain. You also should think about the site of the drain, what amount of rainwater is anticipated and safe practices when choosing a roof water drain for a house or business structure.

Hip roofs, dormers, gable and mansard roofs shed water due to gravity. Flat roofs, on the other hand, accumulate rain water. Until the water is directed out and away from the roof , it will develop pools of water that may eventually leak and the accumulated weight will eventually result in damage to the structure. That is why roofs with a pitch of below two percent ought to have roof drains positioned at the lowest areas on the roof where water pools and need to be evenly spread throughout the roof surface.

Types of Roof Drains


There are several different variations of roof drains. They basically fall into 2 groups: flat roof drains and pitched roof drains. Pitched roof rainwater drains normally comprise gutters which accumulate rainwater that travels via gravity to the roof edge. Gutters transport this water in the direction of downspouts which direct the water flow down and far away from the structure or into sewer lines. Flat roof drains can be one of three main types: scuppers, inner drains or siphonic drains.

Roof Rainwater Drain Scuppes


Scuppers are situated on the roof's perimeter. Scuppers can also be installed on a balcony or terrace. Small holes are cut in the side of the roof structure so that water can flow out and drain the roof surface. Scuppers can hook up to a downspout, or could be extended so that water is guided away from the building sides and foundation.

Inner Roof Drains


There are quite a few different types of inner drains for flat roofs. These are installed at low areas on the roof and connect to inner drainage pipes that drive water outside or into a sewer system. Many styles of inner roof drains have domes, strainers or covers that keep debris from blocking the roof drain pipe. These kinds of drains work via gravity funneling 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 substitute for 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 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 established which pulls rainwater off the roof siphonically. Although 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 strainer in and around Anniston, Alabama, give us a call. We'd be glad to help.