Roof Drains


At this time there are a number of different kinds of roof water drains and roof drain dome in Muscle Shoals, AL and each one is an unique solution to the variety of roof types and their drainage issues. You need to take into consideration the kind of roof, its size, and the roof pitch to be able to pick the correct drain. You also need to take into consideration the site of the drain, what amount of rainwater is expected and safety when choosing a roof drain for a residence or commercial building.

Gable, dormer, mansard and hip roofs shed water due to gravity. Flat roofs, on the other hand, collect water. Until the water is routed out and away from the flat roof structure, it will create pools that could eventually leak and the amassed weight will eventually cause damage to the structure. That is why roofs with a pitch of below 2% ought to have roof drains positioned at the lowest spots on the roof in which water pools and need to be evenly spaced all throughout the roof surface.

Roof Drain Kinds


There are a number of distinct alternatives of roof drains. They basically fall into two categories: flat roof drains and pitched roof drains. Pitched roof rainwater drains normally comprise gutters that accumulate rainwater that passes via gravity to the roof edge. Gutters direct this water towards downspouts which steer the water flow down and far away from the building or in to sewers. Flat roof drains are one of three main types: scuppers, inner drains or siphonic drains.

Roof Drain Scuppers


Scuppers are located on a 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 water can flow out and drain the roof surface. Scuppers can hook up to a downspout, or can be extended so that water is directed away from the structure sides and foundation.

Interior Roof Drains


There are many types of inner drains for flat roofs. These are positioned at low places on the roof and attach to interior drainage pipes that drive water outdoors or in to a sewer system. Several designs of inner roof drains have domes, strainers or covers that keep debris from blocking the roof drain pipe. These kinds of drains operate via gravitational force funneling standing water through the roof drain system. They can be made from PVC, cast iron or cast aluminum.

Siphonic Roof Drains

Siphonic roof drains are a more effective alternative to gravity drainage. Standard flat roof drainage allows both air and water to go into the drain system producing pipe space which is occupied by both air and water. By adding an engineered baffle to the sump of the drain system it produces a siphonic drain that removes air from the system and permits smaller sized pipe diameters to be used. When all air is eliminated, a negative air pressure in the tail piece of the drain is established which pulls 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 roof drain dome in and around Muscle Shoals, Alabama, give us a call. We'd be glad to help.