There are a number of distinct varieties of roof drains and roof drain downspout in Attalla, AL and each is a specific answer to the wide range of roof types and their drainage issues. You should look at the type of roof, its dimensions, and its roof pitch to be able to select the right drain. You also may want to think about the location of the drain, how much rainwater is anticipated and safe practices when selecting a roof water drain for a house or commercial building. Gable, dormer, mansard and hip roofs shed rainwater water due to gravity. Flat roofs, alternatively, accumulate rain water. Unless the water is directed out and away from the flat roof , it will most likely develop pools of water that could inevitably leak and the amassed weight will subsequently result in compromising the integrity of the structure. That is the reason that roofs with a pitch of below two percent should have roof drains positioned at the lowest areas on the roof where water puddles and need to be evenly spread all throughout the roof top.
Types of Roof Drains
There are a number of distinct alternatives of roof drains. They basically fall into two categories: flat roof drains and pitched roof drains. Pitched roof drains usually comprise gutters that collect rainwater that travels via gravity to the roof edge. Gutters direct this water in the direction of downspouts which direct the water flow down and away from the building or into sewers. Flat roof drains can be one of three primary types: scuppers, inner drains or siphonic drains.
Roof Drain Scuppers
Scuppers are located on a roof's perimeter. They can also be put in on a balcony or terrace. Small holes are cut in the side of the roof structure so that water can empty and drain the roof surface. Scuppers can hook up to a downspout, or could be extended to make sure that water is guided away from the structure sides and foundation.
Inner Roof Drains
There are many kinds of inner drains for flat roofs. These are positioned at low spots on the roof and attach to inner drainage pipes that direct water outdoors or into a sewer system. Many versions of inner roof drains have domes, strainers or covers which prevent trash from blocking the roof drain pipe. These kinds of drains operate via gravitational force funneling standing water thru the roof drain system. They can be made of PVC, cast iron or cast aluminum.
Siphonic Roof DrainsSiphonic roof drains are a more efficient alternative to gravity drainage. Conventional flat roof drainage allows both air and water to enter the drain system producing pipe space occupied by both air and water. By adding an engineered baffle to the sump of the drain body it creates a siphonic drain that removes air from the system and permits smaller sized pipe diameters . When all air is eliminated, a negative air pressure in the tail piece of the drain is established which attracts water off the roof siphonically. Though 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 downspout in and around Attalla, Alabama, give us a call. We'd be glad to help.