At this time there are a number of distinct kinds of roof drains and roof drain pan in Gadsden, AL and each one is a specific answer to the variety of roof types and their drainage concerns. You should think about the kind of roof, its size, and the roof pitch to be able to pick the most suitable drain. You also need to take into consideration the location of the drain, how much rainwater is anticipated and safety when choosing a roof drain for a residence or commercial building. Gable, dormer, mansard and hip roofs shed rainwater water thanks to gravitational force. Flat roofs, conversely, collect water. Until this water is directed out and away from the roof structure, it will develop pools that may inevitably leak and the amassed weight may eventually result in structural damage. That is why roofs with a pitch of under 2% ought to have roof drains located at the lowest areas on the roof in which water pools and should be evenly spaced throughout the roof top.
Roof Drain Kinds
There are a number of distinct alternatives of roof drains. They basically fall into 2 groups: pitched roof drains and flat roof drains. Pitched roof drains normally consist of gutters that collect rainwater which passes by means of gravity down to the roof edge. Gutters transport this water towards downspouts which direct the water flow down and far away from the building or into sewers. Flat roof drains can be one of three main types: scuppers, inner drains or siphonic drains.
Roof Drain Scuppers
Scuppers are located on a roof's perimeter. Scuppers can also be installed on a balcony or terrace. Small holes are cut into the side of the roof structure so rain water can empty and drain the roof surface. Scuppers can connect to a downspout, or can be lengthened so that water is directed away from the building sides and foundation.
Interior Roof Drains
There are many types of inner drains for flat roofs. They are installed at low spots in the roof and attach to inner drainage pipes that direct water outside or into a sewer system. Many designs of internal roof drains have domes, strainers or covers that keep debris from obstructing the roof drain pipe. These kinds of drains operate via gravitational force channeling standing 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 alternative to gravity drainage. Conventional flat roof drainage permits both air and water to go into the drain system producing 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 of the air is eliminated, a negative air pressure in the tail piece 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 pitched roofs.
If you need more information about flat roof drain or roof drain pan in and around Gadsden, Alabama, give us a call. We'd be glad to help.