Roof Drains


At this time there are a number of distinct kinds of roof drains and roof drain scupper in Auburn, AL and each is an unique answer to the variety of roof types and their drainage concerns. You need to consider the type of roof, its dimensions, and its roof pitch to be able to select the correct drain. You also should take into consideration the location of the drain, what amount of rainwater is expected and safety when selecting a roof drain for a house or commercial building.

Gambrel, dormers, hip and gable roofs shed water because of gravitational force. Flat roofs, on the other hand, accumulate water. Unless the water is directed out and away from the roof , it will most likely create pools of water that may eventually leak and the amassed weight may eventually result in structural damage. That is why roofs with a pitch of below two percent ought to have roof drains positioned at the lowest spots on the roof in which water puddles and should be uniformly spread throughout the roof surface.

Kinds of Roof Drains


There are several different variations 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 down to the roof periphery. Gutters transport this water in the direction of downspouts which direct the water flow down and far away from the building or into sewer lines. Flat roof drains can be one of three main types: scuppers, inner drains or siphonic drains.

Roof Drain Scuppers


Scuppers are situated on a roof's periphery. Scuppers can also be placed on a balcony or terrace. Small openings are cut in the side of the roof structure so rain water can empty and drain the roof top. Scuppers can attach to a downspout, or can be lengthened so that water is guided away from 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 spots in the roof and connect to inner drainage pipes that direct water outdoors or into a sewer system. Many versions of inner roof drains have domes, strainers or covers which prevent debris from clogging the roof drain pipe. These types of drains work via gravity funneling 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 alternative to gravity drainage. Standard flat roof drainage allows both air and water to enter the drain system creating pipe space which is occupied by both air and water. By incorporating an engineered baffle to the sump of the drain system it creates a siphonic drain that removes air from the system and permits smaller pipe diameters . When all air is removed, a negative air pressure in the tail piece of the drain is established which draws rainwater off the roof siphonically. Although 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 scupper in and around Auburn, Alabama, give us a call. We'd be glad to help.