At this time there are a few distinct types of roof drains and cast iron roof drain in Madison, AL and each is a specific answer to the wide range of roof types and their drainage challenges. You must think about the type of roof, its dimensions, and its roof pitch to be able to pick the right drain. You also need to take into account the location of the drain, what amount of rainwater is expected and safe practices when choosing a roof water drain for a residence or commercial structure. Hip roofs, dormers, gable and mansard roofs shed water thanks to gravity. Flat roofs, conversely, accumulate rain water. Unless this water is directed out and away from the roof , it will most likely create pools that could eventually leak and the amassed weight may eventually result in compromising the integrity of the structure. That is the reason that roofs with a pitch of under two percent ought to have roof drains positioned at the lowest places on the roof where water pools and should be uniformly spaced throughout the roof surface.
Kinds of Roof Drains
There are a number of distinct variations of roof drains. They basically fall into 2 categories: pitched roof drains and flat roof drains. Pitched roof drains normally consist of gutters that collect rainwater that travels via gravity down to the roof edge. Gutters transport this water in the direction of downspouts which route the water flow down and far away from the building or into sewer lines. Flat roof drains are one of three main types: scuppers, inner drains or siphonic drains.
Roof Rainwater Drain Scuppes
Scuppers are located on a roof's periphery. They 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 flow out and drain the roof top. Scuppers can attach to a downspout, or could be extended to make sure that water is guided off of the structure sides and foundation.
Interior Roof Drains
There are many kinds of inner drains for flat roofs. These are installed at low spots on the roof and attach to inner drainage pipes that route water outdoors or in to a sewer system. Many versions of internal roof drains have domes, strainers or covers that prevent debris from clogging the roof drain pipe. These types of drains operate via gravitational force channeling standing water through the roof drain system. They can be constructed from PVC, cast iron or cast aluminum.
Siphonic Roof DrainsSiphonic roof drains are a more efficient substitute for gravity drainage. Standard flat roof drainage permits both air and water to enter the drain system creating pipe space which is 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 to be used. When all air is eliminated, a negative air pressure in the tail portion of the drain is set up which attracts rainwater off the roof siphonically. Though used mainly for flat roofs, siphonic drains can also be installed on angled roofs.
If you need more information about flat roof drain or cast iron roof drain in and around Madison, Alabama, give us a call. We'd be glad to help.