Roof Drains


At this time there are a few distinct types of roof water drains and roof drain cover in Auburn, AL and each one is an unique approach to the wide range of roof types and their drainage issues. You should look at the kind of roof, its dimensions, and the roof pitch to be able to choose the correct drain. You also need to take into consideration the site of the drain, what amount of rainwater is anticipated and safe practices when choosing a roof water drain for a house or business structure.

Gable, dormer, mansard and hip roofs shed water due to gravity. Flat roofs, on the other hand, collect rain water. Unless the water is routed out and away from the roof structure, it will create pools that may eventually leak and the accumulated weight will subsequently cause damage to the structure. That is why roofs with a slope of less than 2% ought to have roof drains positioned in the lowest places on the roof in which water pools and should be evenly spaced all throughout the roof top.

Types of Roof Drains


There are a number of distinct variations of roof drains. They basically fall into 2 groups: flat roof drains and pitched roof drains. Pitched roof rainwater drains normally comprise gutters that collect rainwater that passes by means of gravity down to the roof edge. Gutters transport this water towards downspouts which direct the water flow down and away from the structure or into sewers. Flat roof drains can be one of three primary types: scuppers, inner drains or siphonic drains.

Roof Drain Scuppers


Scuppers are situated on the roof's periphery. Scuppers can also be put in on a balcony or terrace. Small openings are cut in the side of the roof structure so water can empty and drain the roof top. Scuppers can attach to a downspout, or can be lengthened to make sure that water is directed off of the structure sides and foundation.

Inner Roof Drains


There are many types of inner drains for flat roofs. They are installed at low areas in the roof and attach to inner drainage pipes that drive water outside or in to a sewer system. Several styles of inner roof drains have domes, strainers or covers which keep trash from clogging the roof drain pipe. These kinds of drains work via gravitational force funneling standing water through the roof drain system. They are made of PVC, cast iron or cast aluminum.

Siphonic Roof Drains

Siphonic roof drains are a more efficient alternative to gravity drainage. Traditional flat roof drainage permits both air and water to enter the drain system creating pipe space which is occupied by both air and water. By adding an engineered baffle to the sump of the drain body it creates a siphonic drain that removes air from the system and permits smaller sized pipe diameters to be used. When all air is eliminated, a negative air pressure in the tail piece of the drain is set up which pulls rainwater 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 cover in and around Auburn, Alabama, give us a call. We'd be glad to help.