Roof Drains


At this time there are a few different varieties of roof water drains and roof drain strainer in Phenix City, AL and each is an unique answer to the variety of roof types and their drainage concerns. You should look at the kind of roof, its size, and its roof pitch to be able to choose the correct drain. You also should think about the location of the drain, how much rainwater is expected and safety when choosing a roof drain for a residence or commercial building.

Hip roofs, dormers, gable and mansard roofs shed rainwater water thanks to gravitational force. Flat roofs, on the other hand, collect rain water. Unless this water is routed out and away from the roof , it will develop pools that may eventually leak and the amassed weight may eventually result in damage to the structure. That is why roofs with a pitch of below 2% should have roof drains positioned in the lowest spots on the roof where water puddles and need to be uniformly spaced throughout the roof top.

Kinds of Roof Drains


There are a number of distinct alternatives of roof drains. They basically fall into 2 categories: flat roof drains and pitched roof drains. Pitched roof drains usually comprise gutters that accumulate rainwater that travels via gravity to the roof edge. Gutters direct this water in the direction of downspouts which direct the water flow down and away from the structure or into sewer lines. Flat roof drains are one of three primary types: scuppers, inner drains or siphonic drains.

Roof Drain Scuppers


Scuppers are situated on the roof's periphery. Scuppers can also be placed on a balcony or terrace. Small holes are cut into the side of the roof structure so rain water can empty and drain the roof top. Scuppers can attach to a downspout, or could be lengthened to make sure that water is guided off of the building sides and foundation.

Inner Roof Drains


There are many kinds of inner drains for flat roofs. They are positioned at low places in the roof and connect to inner drainage pipes that route water outside or in to a sewer system. Several designs of inner roof drains have domes, strainers or covers that prevent trash from obstructing the roof drain pipe. These types of drains work via gravitational force funneling standing water through the roof drain system. They are made from 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 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 produces a siphonic drain that eliminates air from the system and allows for smaller sized pipe diameters . When all air is eliminated, a negative air pressure in the tail portion of the drain is set up 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 strainer in and around Phenix City, Alabama, give us a call. We'd be glad to help.