There are several different kinds of roof drains and roof drain system in Leeds, AL and each is a specific answer to the wide range of roof styles and their drainage challenges. You must take into consideration the kind of roof, its size, and the roof pitch to be able to pick the most suitable drain. You also should take into consideration the location of the drain, how much rainwater is expected and safety when choosing a roof drain for a home or commercial structure. Hip roofs, dormers, gable and mansard roofs shed rainwater water because of gravity. Flat roofs, alternatively, accumulate water. Until the water is guided out and away from the flat roof , it will most likely develop pools that may inevitably leak and the accumulated weight may eventually result in compromising the integrity of the structure. That is the reason that roofs with a slope of less than 2% should have roof drains situated at the lowest places on the roof in which water pools and should be uniformly spaced all throughout the roof top.
Types of Roof Drains
There are several distinct alternatives of roof drains. They generally fall into two groups: pitched roof drains and flat roof drains. Pitched roof drains normally comprise gutters which collect rainwater that passes by means of gravity to the roof edge. Gutters channel this water in the direction of downspouts which steer 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 Rainwater Drain Scuppes
Scuppers are situated on a roof's perimeter. Scuppers can also be put in on a balcony or terrace. Small holes are cut into the side of the roof structure so 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 quite a few different types of inner drains for flat roofs. These are positioned at low places in the roof and attach to interior drainage pipes that route water outdoors or in to a sewer system. Many versions of inner roof drains have domes, strainers or covers which prevent debris from obstructing the roof drain pipe. These types of drains work via gravity channeling pooling water through the roof drain system. They can be made from PVC, cast iron or cast aluminum.
Siphonic Roof DrainsSiphonic roof drains are a more efficient substitute for gravity drainage. Conventional flat roof drainage allows both air and water to go into the drain system producing pipe space occupied by both air and water. By adding an engineered baffle to the sump of the drain system it creates a siphonic drain which removes air from the system and permits smaller pipe diameters . When all air is removed, a negative air pressure in the tail portion of the drain is set up 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 Leeds, Alabama, give us a call. We'd be glad to help.