Roof Drains


There are a few distinct types of roof drains and cast iron roof drain in Prattville, AL and each one is a specific solution to the variety of roof types and their drainage concerns. You must take into consideration the type of roof, its size, and its roof pitch to be able to select the correct drain. You also should take into consideration the site of the drain, what amount of rainwater is anticipated and safety when selecting a roof water drain for a residence or commercial building.

Gambrel, dormers, hip and gable roofs shed water thanks to gravitational force. Flat roofs, conversely, collect water. Unless the water is directed out and away from the roof , it will most likely develop pools of water that may inevitably leak and the amassed weight may subsequently cause damage to the structure. That is why roofs with a slope of less than two percent should have roof drains situated in the lowest places on the roof where water pools and need to be uniformly spread all throughout the roof top.

Roof Drain Kinds


There are a number of distinct alternatives of roof drains. They basically fall into 2 groups: pitched roof drains and flat roof drains. Pitched roof rainwater drains normally comprise gutters which collect rainwater which passes by means of gravity down to the roof edge. Gutters transport this water in the direction of downspouts which steer the water flow down and far 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 Drain Scuppers


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

Inner Roof Drains


There are quite a few different types of inner drains for flat roofs. These are installed at low places on the roof and connect to interior drainage pipes that route water outside or into a sewer system. Several versions of internal roof drains have domes, strainers or covers that prevent trash from obstructing the roof drain pipe. These kinds of drains work via gravity 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 effective alternative to gravity drainage. Standard flat roof drainage allows 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 body it produces a siphonic drain which removes air from the system and permits smaller pipe diameters . When all of the air is removed, a negative air pressure in the tail piece of the drain is set up which pulls rainwater off the roof siphonically. Although 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 Prattville, Alabama, give us a call. We'd be glad to help.