Roof Drains


There are several different varieties of roof water drains and roof drain pvc in Birmingham, AL and each is an unique solution to the variety of roof styles and their drainage issues. You should consider the kind of roof, its size, and the roof pitch to be able to pick the most suitable drain. You also should take into account the location of the drain, how much rainwater is anticipated and safe practices when selecting a roof drain for a house or business structure.

Gambrel, dormers, hip and gable roofs shed water due to gravitational force. Flat roofs, conversely, collect rain water. Until the water is routed out and away from the flat roof structure, it will develop pools that could inevitably leak and the amassed weight may eventually cause damage to the structure. That is why roofs with a slope of under 2% ought to have roof drains situated in the lowest places on the roof in which water pools and need to be evenly spaced throughout the roof surface.

Kinds of Roof Drains


There are several different alternatives of roof drains. They generally fall into two groups: flat roof drains and pitched roof drains. Pitched roof drains usually consist of gutters that collect rainwater that passes by means of gravity down to the roof edge. Gutters direct this water in the direction of downspouts which direct the water flow down and away from the building or in to sewers. Flat roof drains are one of three primary types: scuppers, inner drains or siphonic drains.

Roof Rainwater Drain Scuppes


Scuppers are situated on the 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 lengthened so that water is guided off of the structure 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 direct water outdoors or in to a sewer system. Several styles of internal roof drains have domes, strainers or covers that prevent debris from obstructing the roof drain pipe. These types of drains work via gravitational force channeling standing water through the roof drain system. They are 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 enter the drain system producing 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 permits smaller sized pipe diameters . 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. 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 pvc in and around Birmingham, Alabama, give us a call. We'd be glad to help.