At this time there are several distinct types of roof drains and roof drain cover in Jasper, AL and each is an unique solution to the variety of roof styles and their drainage concerns. You must take into consideration the kind of roof, its dimensions, and its roof pitch to be able to select the correct drain. You also need to think about the site of the drain, how much rainwater is anticipated and safety when selecting a roof water drain for a home or business building. Gambrel, dormers, hip and gable roofs shed water thanks to gravity. Flat roofs, alternatively, collect water. Until this water is directed out and away from the roof structure, it will most likely develop pools that could eventually 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 under 2% should have roof drains positioned in the lowest spots on the roof where water pools and should be uniformly spaced throughout the roof surface.
Roof Drain Types
There are a number of distinct alternatives of roof drains. They basically fall into two groups: pitched roof drains and flat roof drains. Pitched roof drains usually comprise gutters which accumulate rainwater that passes by means of gravity to the roof periphery. Gutters transport this water towards downspouts which steer the water flow down and far 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 located on the roof's periphery. They can also be put in on a balcony or terrace. Small holes are cut in the side of the roof structure so rain water can flow out and drain the roof top. Scuppers can hook up to a downspout, or could be lengthened so that water is directed off of the structure sides and foundation.
Inner Roof Drains
There are quite a few different kinds of inner drains for flat roofs. These are installed at low spots in the roof and connect to inner drainage pipes that drive water outside or into a sewer system. Many designs of inner roof drains have domes, strainers or covers that keep trash from blocking the roof drain pipe. These types of drains work via gravity funneling pooling water through the roof drain system. They are constructed from PVC, cast iron or cast aluminum.
Siphonic Roof DrainsSiphonic roof drains are a more efficient substitute for gravity drainage. Standard flat roof drainage permits both air and water to enter the drain system creating 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 which removes air from the system and allows for smaller pipe diameters . When all air is removed, a negative air pressure in the tail piece of the drain is established which attracts rainwater 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 cover in and around Jasper, Alabama, give us a call. We'd be glad to help.