Roof Drains


At this time there are several distinct varieties of roof drains and roof drain system in Opelika, AL and each is a specific approach to the variety of roof types and their drainage issues. You must think about the type of roof, its dimensions, and the roof pitch to be able to choose the correct drain. You also should think about the site of the drain, how much rainwater is anticipated and safety when selecting a roof drain for a home or business structure.

Gable, dormer, mansard and hip roofs shed rainwater water due to gravity. Flat roofs, conversely, accumulate water. Until the water is routed 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 damage to the structure. That is why roofs with a slope of under two percent ought to have roof drains situated at the lowest places on the roof where water pools and need to be evenly spread throughout the roof top.

Roof Drain Kinds


There are a number of distinct variations of roof drains. They basically fall into two categories: flat roof drains and pitched roof drains. Pitched roof drains usually consist of gutters which collect rainwater which travels by means of gravity down to the roof edge. Gutters transport this water towards downspouts which route the water flow down and away from the structure or into sewers. Flat roof drains are 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 openings are cut in the side of the roof structure so rain water can flow out and drain the roof surface. Scuppers can hook up to a downspout, or could be lengthened to make sure that water is directed away from the building sides and foundation.

Inner Roof Drains


There are many types of inner drains for flat roofs. These are positioned at low spots on the roof and attach to interior drainage pipes that route water outside or into a sewer system. Several designs of internal roof drains have domes, strainers or covers that prevent trash from blocking the roof drain pipe. These types of drains work via gravitational force funneling standing water through the roof drain system. They are made from PVC, cast iron or cast aluminum.

Siphonic Roof Drains

Siphonic roof drains are a more efficient substitute for gravity drainage. Standard flat roof drainage permits both air and water to go into the drain system creating pipe space occupied by both air and water. By incorporating an engineered baffle to the sump of the drain body it creates a siphonic drain that eliminates air from the system and permits smaller pipe diameters . When all air is eliminated, a negative air pressure in the tail piece of the drain is established which draws water off the roof siphonically. Although used primarily for flat roofs, siphonic drains can also be installed on pitched roofs.

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