Roof Drains


There are a few distinct types of roof water drains and roof drain strainer in Muscle Shoals, AL and each is an unique approach to the variety of roof styles and their drainage concerns. You must take into consideration the kind of roof, its dimensions, and its roof pitch to be able to pick the most suitable drain. You also may want to take into account the location of the drain, how much rainwater is anticipated and safe practices when choosing a roof water drain for a home or commercial building.

Hip roofs, dormers, gable and mansard roofs shed rainwater water because of gravity. Flat roofs, alternatively, accumulate rain water. Unless this water is guided out and away from the roof structure, it will create pools that may inevitably leak and the accumulated weight will eventually cause compromising the integrity of the structure. That is the reason that roofs with a slope of under 2% should have roof drains positioned in the lowest places on the roof where water pools and should be evenly spaced throughout the roof surface.

Kinds of Roof Drains


There are a number of distinct variations of roof drains. They basically fall into two groups: flat roof drains and pitched roof drains. Pitched roof drains normally comprise gutters which collect rainwater that travels by means of gravity to the roof edge. Gutters transport this water in the direction of downspouts which route the water flow down and far 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 the roof's periphery. They can also be placed on a balcony or terrace. Small openings are cut into the side of the roof structure so rain water can empty and drain the roof top. Scuppers can connect to a downspout, or can be extended so that water is guided off of the building sides and foundation.

Interior Roof Drains


There are quite a few different kinds of inner drains for flat roofs. They are positioned at low spots in the roof and attach to interior drainage pipes that direct water outdoors or in to a sewer system. Several versions of internal roof drains have domes, strainers or covers that prevent trash from obstructing the roof drain pipe. These kinds of drains operate via gravity funneling pooling water through the roof drain system. They can be made of PVC, cast iron or cast aluminum.

Siphonic Roof Drains

Siphonic roof drains are a more efficient substitute for gravity drainage. Conventional flat roof drainage permits both air and water to go into the drain system creating pipe space occupied by both air and water. By adding an engineered baffle to the sump of the drain body it creates a siphonic drain which eliminates 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 set up which draws water off the roof siphonically. Although used mainly for flat roofs, siphonic drains can also be installed on angled roofs.

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