Roof Drains


There are several different varieties of roof drains and roof drain downspout in Phenix City, AL and each one is a specific solution to the wide range of roof types and their drainage issues. You must consider the type of roof, its dimensions, and its roof pitch to be able to select the most suitable drain. You also need to take into account the site of the drain, how much rainwater is expected and safe practices when choosing a roof drain for a home or commercial building.

Gable, dormer, mansard and hip roofs shed water thanks to gravity. Flat roofs, on the other hand, collect rain water. Until the water is routed out and away from the roof , it will most likely develop pools of water that could inevitably leak and the amassed weight will subsequently cause damage to the structure. That is the reason that roofs with a slope of under 2% should have roof drains positioned at the lowest spots on the roof where water pools 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 drains normally comprise gutters that accumulate rainwater which passes via gravity to the roof edge. Gutters direct this water in the direction of downspouts which route the water flow down and away from the building or in to sewers. Flat roof drains can be one of three primary types: scuppers, inner drains or siphonic drains.

Roof Rainwater Drain Scuppes


Scuppers are situated on the roof's periphery. They can also be put in on a balcony or terrace. Small holes 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 guided away from the building sides and foundation.

Inner Roof Drains


There are quite a few different kinds of inner drains for flat roofs. They are installed at low places on the roof and attach to interior drainage pipes that direct water outdoors or into a sewer system. Several styles of inner roof drains have domes, strainers or covers which prevent debris from obstructing the roof drain pipe. These types of drains work via gravity funneling standing water thru the roof drain system. They can be constructed from PVC, cast iron or cast aluminum.

Siphonic Roof Drains

Siphonic roof drains are a more efficient alternative to gravity drainage. Conventional flat roof drainage allows both air and water to enter 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 produces a siphonic drain that removes air from the system and permits smaller sized pipe diameters . When all of the air is removed, a negative air pressure in the tail piece of the drain is established which pulls rainwater off the roof siphonically. Though used primarily for flat roofs, siphonic drains can also be set up on pitched roofs.

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