Roof Drains


At this time there are a number of different kinds of roof drains and roof drain pipe in Leeds, AL and each is a specific solution to the wide range of roof styles and their drainage concerns. You should consider the type of roof, its size, and its roof pitch to be able to select the most suitable drain. You also should think about the site of the drain, what amount of rainwater is anticipated and safety when choosing a roof drain for a home or commercial structure.

Gambrel, dormers, hip and gable roofs shed rainwater water due to gravitational force. Flat roofs, alternatively, accumulate rain water. Until the water is guided out and away from the flat roof , it will most likely develop pools that could eventually leak and the amassed weight will eventually cause damage to the structure. That is the reason that roofs with a slope of below two percent ought to have roof drains situated at the lowest spots on the roof in which water puddles and should be evenly spread throughout the roof surface.

Roof Drain Types


There are a number of distinct variations of roof drains. They basically fall into two groups: flat roof drains and pitched roof drains. Pitched roof drains normally comprise gutters that accumulate rainwater that passes by means of gravity down to the roof edge. Gutters direct this water towards downspouts which direct the water flow down and away from the structure or in to sewers. Flat roof drains are one of three primary types: scuppers, inner drains or siphonic drains.

Roof Rainwater Drain Scuppes


Scuppers are located on a roof's periphery. Scuppers can also be installed on a balcony or terrace. Small openings are cut into the side of the roof structure so rain water can flow out and drain the roof surface. Scuppers can connect to a downspout, or can be extended so that water is directed off of 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 on the roof and connect to inner drainage pipes that direct water outdoors or into a sewer system. Several models of inner roof drains have domes, strainers or covers which prevent trash from clogging the roof drain pipe. These kinds of drains work via gravitational force channeling pooling water thru the roof drain system. They can be made of PVC, cast iron or cast aluminum.

Siphonic Roof Drains

Siphonic roof drains are a more effective 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 produces a siphonic drain which eliminates air from the system and allows for smaller pipe diameters . When all of the air is removed, a negative air pressure in the tail piece of the drain is set up which pulls rainwater off the roof siphonically. Although used mainly 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 pipe in and around Leeds, Alabama, give us a call. We'd be glad to help.