Roof Drains


There are a number of different types of roof water drains and cast iron roof drain in Hartselle, AL and each is a specific approach to the variety of roof types and their drainage issues. You should think about the type of roof, its dimensions, and its roof pitch to be able to select the most suitable drain. You also should take into consideration the location of the drain, what amount of rainwater is anticipated and safety when selecting a roof water drain for a house or commercial building.

Gable, dormer, mansard and hip roofs shed water thanks to gravitational force. Flat roofs, conversely, accumulate water. Until this water is directed out and away from the flat roof , it will most likely create pools that may eventually leak and the accumulated weight may subsequently cause structural damage. That is the reason that roofs with a pitch of less than two percent should have roof drains positioned in the lowest areas on the roof where water puddles and need to be uniformly spread throughout the roof surface.

Roof Drain Types


There are several distinct alternatives of roof drains. They basically fall into two groups: flat roof drains and pitched roof drains. Pitched roof rainwater drains usually consist of gutters that accumulate rainwater which passes by means of gravity down to the roof periphery. Gutters channel this water in the direction of downspouts which route the water flow down and away from the structure or into sewer lines. Flat roof drains can be one of three main types: scuppers, inner drains or siphonic drains.

Roof Rainwater Drain Scuppes


Scuppers are located on the roof's perimeter. They can also be placed on a balcony or terrace. Small holes are cut into the side of the roof structure so that water can empty and drain the roof top. Scuppers can hook up 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 quite a few different kinds of inner drains for flat roofs. They are installed at low spots in the roof and attach to interior drainage pipes that drive water outside or into a sewer system. Several styles of inner roof drains have domes, strainers or covers that prevent debris from clogging the roof drain pipe. These types of drains work via gravitational force funneling standing water through the roof drain system. They are constructed from PVC, cast iron or cast aluminum.

Siphonic Roof Drains

Siphonic roof drains are a more effective alternative to gravity drainage. Traditional flat roof drainage allows 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 system it creates a siphonic drain which eliminates air from the system and permits smaller sized pipe diameters to be used. When all of the air is removed, a negative air pressure in the tail piece of the drain is set up which pulls water off the roof siphonically. Though used mainly for flat roofs, siphonic drains can also be installed on angled roofs.

If you need more information about flat roof drain or cast iron roof drain in and around Hartselle, Alabama, give us a call. We'd be glad to help.