Roof Drains


At this time there are a few different varieties of roof drains and cast iron roof drain in Pinson, AL and each one is an unique solution to the wide range of roof types and their drainage issues. You should consider the type of roof, its size, and the roof pitch to be able to choose the correct drain. You also may want to take into consideration the location of the drain, how much rainwater is expected and safety when choosing a roof drain for a home or commercial building.

Hip roofs, dormers, gable and mansard roofs shed rainwater water because of gravity. Flat roofs, conversely, accumulate water. Until the water is guided out and away from the roof , it will most likely develop pools of water that may eventually leak and the accumulated weight may eventually cause damage to the structure. That is why roofs with a slope of under 2% ought to have roof drains located at the lowest spots on the roof in which water puddles and need to be evenly spaced all throughout the roof surface.

Kinds of Roof Drains


There are several distinct variations of roof drains. They generally fall into 2 groups: pitched roof drains and flat roof drains. Pitched roof rainwater drains usually comprise gutters that accumulate rainwater which passes by means of gravity to the roof edge. Gutters direct this water towards downspouts which direct the water flow down and away from the building or in to 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 the roof's periphery. They can also be installed on a balcony or terrace. Small holes are cut into the side of the roof structure so that water can flow out and drain the roof surface. Scuppers can connect 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 quite a few different types of inner drains for flat roofs. They are positioned at low places in the roof and connect to interior drainage pipes that direct water outdoors or in to a sewer system. Many styles of internal roof drains have domes, strainers or covers which prevent debris from clogging the roof drain pipe. These types of drains work via gravitational force channeling standing water thru 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 permits both air and water to enter the drain system producing pipe space occupied by both air and water. By incorporating an engineered baffle to the sump of the drain system it produces a siphonic drain that removes air from the system and permits smaller sized pipe diameters to be used. When all air is eliminated, a negative air pressure in the tail portion of the drain is set up 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 cast iron roof drain in and around Pinson, Alabama, give us a call. We'd be glad to help.