Roof Drains


At this time there are a few different types of roof water drains and roof drain scupper in Muscle Shoals, AL and each one is a specific answer to the wide range of roof styles and their drainage issues. 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 take into account the location of the drain, what amount of rainwater is anticipated and safe practices when choosing a roof drain for a house or commercial structure.

Gambrel, dormers, hip and gable roofs shed water thanks to gravitational force. Flat roofs, alternatively, accumulate rain water. Unless this water is directed out and away from the roof , it will most likely create pools of water that may eventually leak and the accumulated weight may subsequently result in compromising the integrity of the structure. That is why roofs with a slope of below two percent ought to have roof drains situated at the lowest spots on the roof where water pools and need to be evenly spaced throughout the roof surface.

Kinds of Roof Drains


There are a number of distinct variations of roof drains. They generally fall into two groups: pitched roof drains and flat roof drains. Pitched roof rainwater drains usually comprise gutters that collect rainwater that travels via gravity down to the roof edge. Gutters direct this water in the direction of downspouts which direct the water flow down and away from the building or in to sewers. Flat roof drains are one of three primary types: scuppers, inner drains or siphonic drains.

Roof Drain Scuppers


Scuppers are located on a roof's periphery. Scuppers can also be installed on a balcony or terrace. Small openings are cut into the side of the roof structure so rain water can flow out and drain the roof top. Scuppers can attach to a downspout, or could be extended to make sure that water is directed off of the structure sides and foundation.

Interior Roof Drains


There are many kinds of inner drains for flat roofs. These are positioned at low spots on the roof and connect to interior drainage pipes that drive water outside or in to a sewer system. Several designs of internal roof drains have domes, strainers or covers that keep trash from clogging the roof drain pipe. These kinds of drains work via gravitational force channeling 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 effective alternative to gravity drainage. Conventional 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 produces a siphonic drain that removes air from the system and permits smaller sized pipe diameters . When all of the air is eliminated, a negative air pressure in the tail piece of the drain is established which attracts 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 scupper in and around Muscle Shoals, Alabama, give us a call. We'd be glad to help.