Roof Drains


At this time there are several distinct varieties of roof water drains and roof drain pipe in Pinson, AL and each is an unique answer to the wide range of roof styles and their drainage challenges. You must consider the type of roof, its dimensions, and the roof pitch to be able to select the most suitable drain. You also may want to think about the site of the drain, how much rainwater is anticipated and safety when selecting a roof water drain for a home or business building.

Hip roofs, dormers, gable and mansard roofs shed water due to gravitational force. Flat roofs, alternatively, collect rain water. Unless this water is routed out and away from the flat roof , it will create pools of water that may eventually leak and the accumulated weight will eventually result in compromising the integrity of the structure. That is why roofs with a slope of below 2% ought to have roof drains situated at the lowest spots on the roof in which water puddles and need to be uniformly spread throughout the roof top.

Kinds of Roof Drains


There are several different alternatives of roof drains. They basically fall into two groups: flat roof drains and pitched roof drains. Pitched roof rainwater drains usually comprise gutters which accumulate rainwater which passes by means of gravity down to the roof edge. Gutters channel this water in the direction of downspouts which steer the water flow down and away from the structure or in to sewer lines. Flat roof drains can be one of three main types: scuppers, inner drains or siphonic drains.

Roof Drain Scuppers


Scuppers are located on a roof's periphery. Scuppers can also be installed 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 surface. Scuppers can hook up to a downspout, or can be lengthened to make sure that water is guided off of the building sides and foundation.

Interior Roof Drains


There are quite a few different types of inner drains for flat roofs. They are positioned at low areas in the roof and attach to interior drainage pipes that direct water outside or in to a sewer system. Several styles of internal roof drains have domes, strainers or covers that prevent debris from blocking the roof drain pipe. These kinds of drains work via gravitational force channeling 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 alternative to gravity drainage. Conventional flat roof drainage permits both air and water to go into 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 removes air from the system and permits smaller sized pipe diameters to be used. When all of the air is eliminated, a negative air pressure in the tail portion 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 pipe in and around Pinson, Alabama, give us a call. We'd be glad to help.