Roof Drains


There are a number of distinct kinds of roof water drains and cast iron roof drain in Jacksonville, AL and each one is a specific solution to the variety of roof styles and their drainage concerns. You should think about the type of roof, its size, and its roof pitch to be able to select the right drain. You also may want to think about the location of the drain, how much rainwater is expected and safe practices when selecting a roof water drain for a residence or business building.

Gable, dormer, mansard and hip roofs shed rainwater water thanks to gravitational force. Flat roofs, conversely, accumulate rain water. Unless this water is routed out and away from the roof structure, it will develop pools of water that could inevitably leak and the amassed weight will subsequently result in damage to the structure. That is the reason that roofs with a pitch of below 2% ought to have roof drains situated at the lowest spots on the roof in which water puddles and should be evenly spaced all throughout the roof top.

Kinds of Roof Drains


There are several distinct variations of roof drains. They generally fall into 2 categories: pitched roof drains and flat roof drains. Pitched roof rainwater drains usually consist of gutters that accumulate rainwater that travels by means of gravity to the roof periphery. Gutters transport this water in the direction of downspouts which route 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 the 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 that rain water can flow out and drain the roof surface. Scuppers can connect to a downspout, or can be extended to make sure that water is directed away from the building sides and foundation.

Inner Roof Drains


There are quite a few different kinds of inner drains for flat roofs. These are installed at low areas in the roof and connect to inner drainage pipes that direct water outdoors or into a sewer system. Several designs of inner roof drains have domes, strainers or covers that prevent debris from blocking the roof drain pipe. These kinds of drains work via gravitational force channeling pooling 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. Traditional flat roof drainage permits both air and water to enter the drain system producing pipe space which is occupied by both air and water. By incorporating 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 to be used. When all air is removed, a negative air pressure in the tail portion of the drain is established which attracts water off the roof siphonically. Although used primarily 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 Jacksonville, Alabama, give us a call. We'd be glad to help.