At this time there are a few distinct kinds of roof water drains and roof drain cover in Oxford, AL and each one is an unique approach to the wide range of roof types and their drainage challenges. You must think about the type of roof, its dimensions, and its roof pitch to be able to select the right drain. You also need to take into account the site of the drain, how much rainwater is expected and safety when selecting a roof water drain for a house or commercial structure. Gable, dormer, mansard and hip roofs shed water due to gravitational force. Flat roofs, alternatively, collect rain water. Until the water is guided out and away from the roof structure, it will most likely develop pools of water that could inevitably leak and the amassed weight will eventually result in damage to the structure. That is why roofs with a slope of below two percent ought to have roof drains located at the lowest areas on the roof in which water puddles and need to be uniformly spaced throughout the roof top.
Kinds of Roof Drains
There are a number of different alternatives of roof drains. They basically fall into two groups: pitched roof drains and flat roof drains. Pitched roof drains usually consist of gutters that collect rainwater that travels by means of gravity down to the roof edge. Gutters transport this water in the direction of downspouts which steer the water flow down and away from the structure or in to sewers. 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 periphery. Scuppers can also be installed on a balcony or terrace. Small holes are cut in the side of the roof structure so water can empty and drain the roof top. Scuppers can connect to a downspout, or can be lengthened to make sure that water is guided away from the building sides and foundation.
Interior Roof Drains
There are many types of inner drains for flat roofs. They are positioned at low areas in the roof and connect to inner drainage pipes that route water outside or into a sewer system. Many designs of inner roof drains have domes, strainers or covers which prevent debris from obstructing the roof drain pipe. These kinds of drains work via gravity funneling pooling water thru the roof drain system. They are made of PVC, cast iron or cast aluminum.
Siphonic Roof DrainsSiphonic roof drains are a more efficient alternative to gravity drainage. Standard flat roof drainage allows both air and water to enter the drain system creating pipe space occupied by both air and water. By incorporating an engineered baffle to the sump of the drain system it produces a siphonic drain which removes air from the system and allows for smaller sized pipe diameters . When all air is eliminated, a negative air pressure in the tail piece of the drain is set up which pulls rainwater off the roof siphonically. Though used mainly 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 cover in and around Oxford, Alabama, give us a call. We'd be glad to help.