Roof Drains


There are several different varieties of roof drains and roof drain downspout in Florence, AL and each one is a specific solution to the variety of roof styles and their drainage issues. You must look at the kind of roof, its dimensions, and the roof pitch to be able to choose the most suitable drain. You also should think about the site of the drain, how much rainwater is expected and safe practices when choosing a roof drain for a house or business structure.

Gable, dormer, mansard and hip roofs shed water thanks to gravity. Flat roofs, conversely, accumulate water. Until the water is routed out and away from the flat roof structure, it will most likely develop pools that could inevitably leak and the accumulated weight may subsequently result in compromising the integrity of the structure. That is why roofs with a pitch of below two percent ought to have roof drains positioned at the lowest places on the roof in which water pools and need to be uniformly spaced all throughout the roof surface.

Roof Drain Types


There are several distinct alternatives of roof drains. They generally fall into 2 groups: flat roof drains and pitched roof drains. Pitched roof rainwater drains normally comprise gutters that accumulate rainwater which passes by means of gravity to the roof edge. Gutters direct this water in the direction of downspouts which route 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 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 water can empty and drain the roof surface. Scuppers can hook up to a downspout, or can be extended to make sure that water is directed off of the building sides and foundation.

Inner Roof Drains


There are many kinds of inner drains for flat roofs. These are installed at low areas in the roof and connect to inner drainage pipes that drive water outdoors or into a sewer system. Several styles of inner roof drains have domes, strainers or covers which prevent trash from clogging the roof drain pipe. These kinds of drains operate via gravitational force channeling standing water thru the roof drain system. They are constructed from PVC, cast iron or cast aluminum.

Siphonic Roof Drains

Siphonic roof drains are a more efficient substitute for gravity drainage. Standard flat roof drainage permits both air and water to go into the drain system creating pipe space occupied by both air and water. By incorporating an engineered baffle to the sump of the drain system it creates a siphonic drain which removes air from the system and permits smaller sized pipe diameters . When all of the air is removed, a negative air pressure in the tail piece of the drain is set up which attracts 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 downspout in and around Florence, Alabama, give us a call. We'd be glad to help.