There are a few distinct types of roof drains and roof drain cover in Killen, AL and each is an unique answer to the wide range of roof styles and their drainage concerns. You should look at the type of roof, its size, and the roof pitch to be able to select the correct drain. You also need to take into account the location of the drain, what amount of rainwater is expected and safe practices when selecting a roof water drain for a residence or business building. Hip roofs, dormers, gable and mansard roofs shed rainwater water due to gravitational force. Flat roofs, alternatively, collect water. Until the water is directed out and away from the flat roof , it will most likely develop pools of water that may eventually leak and the amassed weight may subsequently cause damage to the structure. That is the reason that roofs with a pitch of under 2% ought to have roof drains located in the lowest areas on the roof in which water pools and should be uniformly spread all throughout the roof top.
Roof Drain Kinds
There are a number of different alternatives of roof drains. They basically fall into two categories: pitched roof drains and flat roof drains. Pitched roof rainwater drains usually consist of gutters which accumulate rainwater which passes by means of gravity down to the roof periphery. Gutters direct this water in the direction of downspouts which direct the water flow down and away from the building or into sewer lines. Flat roof drains are one of three primary types: scuppers, inner drains or siphonic drains.
Roof Rainwater Drain Scuppes
Scuppers are situated on a roof's periphery. Scuppers can also be installed on a balcony or terrace. Small openings are cut into 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 to make sure that water is directed away from the building sides and foundation.
Interior Roof Drains
There are many kinds of inner drains for flat roofs. These are installed at low areas in the roof and attach to interior drainage pipes that route water outside or into a sewer system. Many models of inner roof drains have domes, strainers or covers which prevent trash from obstructing the roof drain pipe. These types of drains operate via gravitational force funneling pooling water thru the roof drain system. They are made from PVC, cast iron or cast aluminum.
Siphonic Roof DrainsSiphonic roof drains are a more effective substitute for gravity drainage. Traditional flat roof drainage allows both air and water to go into the drain system creating pipe space which is occupied by both air and water. By adding an engineered baffle to the sump of the drain body it produces a siphonic drain which eliminates air from the system and allows for smaller pipe diameters to be used. When all of the air is removed, a negative air pressure in the tail portion of the drain is established which pulls water off the roof siphonically. Though 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 cover in and around Killen, Alabama, give us a call. We'd be glad to help.