Roof Drains


At this time there are several distinct kinds of roof water drains and roof drain cover in Clanton, AL and each one is an unique answer to the wide range of roof styles and their drainage issues. You must look at the type of roof, its dimensions, and the roof pitch to be able to choose the most suitable drain. You also should take into consideration the site of the drain, what amount of rainwater is expected and safe practices when selecting a roof water drain for a residence or commercial building.

Gable, dormer, mansard and hip roofs shed rainwater water due to gravity. Flat roofs, conversely, accumulate water. Until 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 will subsequently cause compromising the integrity of the structure. That is the reason that roofs with a pitch of under 2% should have roof drains situated at the lowest places on the roof in which water pools and should be evenly spaced throughout the roof top.

Kinds of Roof Drains


There are a number of distinct variations of roof drains. They basically fall into two categories: pitched roof drains and flat roof drains. Pitched roof rainwater drains normally comprise gutters which accumulate rainwater which travels via gravity to the roof periphery. Gutters transport this water towards downspouts which route 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 Rainwater Drain Scuppes


Scuppers are situated on a roof's periphery. Scuppers can also be put in on a balcony or terrace. Small holes are cut in the side of the roof structure so that water can empty and drain the roof surface. Scuppers can connect to a downspout, or could be extended so that water is directed off of the building sides and foundation.

Inner Roof Drains


There are quite a few different types of inner drains for flat roofs. They are installed at low places on the roof and connect to interior drainage pipes that route water outside or in to a sewer system. Several versions of internal roof drains have domes, strainers or covers which prevent trash from clogging the roof drain pipe. These kinds of drains operate via gravitational force funneling pooling water through the roof drain system. They are constructed from PVC, cast iron or cast aluminum.

Siphonic Roof Drains

Siphonic roof drains are a more efficient substitute for gravity drainage. Conventional flat roof drainage allows 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 system it creates a siphonic drain which eliminates air from the system and allows for smaller pipe diameters . When all of the air is eliminated, a negative air pressure in the tail portion of the drain is established which pulls rainwater off the roof siphonically. Although used mainly 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 cover in and around Clanton, Alabama, give us a call. We'd be glad to help.