Roof Drains


There are a few distinct types of roof drains and roof drain system in Muscle Shoals, AL and each one is a specific answer to the variety of roof styles and their drainage issues. You must consider the kind of roof, its dimensions, and the roof pitch to be able to choose the most suitable drain. You also need to take into account the site of the drain, how much rainwater is anticipated and safe practices when selecting a roof drain for a residence or business structure.

Gable, dormer, mansard and hip roofs shed water thanks to gravity. Flat roofs, alternatively, collect water. Until the water is directed out and away from the flat roof structure, it will develop pools of water that may inevitably leak and the accumulated weight will subsequently result in damage to the structure. That is the reason that roofs with a slope of under two percent should have roof drains located in the lowest spots on the roof where water pools and should be evenly spaced throughout the roof top.

Kinds of Roof Drains


There are several distinct alternatives of roof drains. They basically fall into 2 categories: pitched roof drains and flat roof drains. Pitched roof rainwater drains usually consist of gutters that accumulate rainwater which passes via gravity down to the roof periphery. Gutters transport this water towards downspouts which direct the water flow down and far away from the structure or in to sewers. Flat roof drains are one of three main types: scuppers, inner drains or siphonic drains.

Roof Rainwater Drain Scuppes


Scuppers are situated on the roof's perimeter. They can also be put in on a balcony or terrace. Small holes are cut in the side of the roof structure so that rain water can empty and drain the roof top. Scuppers can connect to a downspout, or can be lengthened so 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. These are installed at low places in the roof and connect to inner drainage pipes that drive water outdoors or into a sewer system. Many models of internal roof drains have domes, strainers or covers which prevent trash from blocking the roof drain pipe. These kinds of drains work via gravity channeling pooling water thru the roof drain system. They are made from PVC, cast iron or cast aluminum.

Siphonic Roof Drains

Siphonic roof drains are a more efficient substitute for gravity drainage. Standard flat roof drainage permits both air and water to go into 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 body it creates a siphonic drain that removes 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 piece of the drain is set up which pulls water off the roof siphonically. Although used mainly for flat roofs, siphonic drains can also be installed on pitched roofs.

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