Roof Drains


There are a few distinct types of roof drains and cast iron roof drain in Piedmont, AL and each is an unique answer to the wide range of roof styles and their drainage challenges. You must think about the kind of roof, its dimensions, and its roof pitch to be able to pick the most suitable drain. You also should take into account the site of the drain, how much rainwater is expected and safety when selecting a roof water drain for a residence or business building.

Gambrel, dormers, hip and gable roofs shed water due to gravity. Flat roofs, conversely, collect rain water. Unless this water is directed out and away from the flat roof , it will most likely create pools that could inevitably leak and the accumulated weight may subsequently cause damage to the structure. That is the reason that roofs with a slope of less than 2% ought to have roof drains positioned at the lowest places on the roof where water puddles and need to be uniformly spread throughout the roof surface.

Types of Roof Drains


There are several distinct variations of roof drains. They generally fall into 2 categories: pitched roof drains and flat roof drains. Pitched roof rainwater drains normally comprise gutters that accumulate rainwater which travels by means of gravity down to the roof edge. Gutters direct this water in the direction of downspouts which route the water flow down and far away from the building or in to sewers. Flat roof drains are one of three main types: scuppers, inner drains or siphonic drains.

Roof Rainwater Drain Scuppes


Scuppers are located on the roof's perimeter. 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 top. Scuppers can attach to a downspout, or can be extended so that water is guided off of the structure sides and foundation.

Inner Roof Drains


There are quite a few different kinds of inner drains for flat roofs. They are installed at low areas on the roof and attach to interior drainage pipes that direct water outside or into a sewer system. Many models of inner roof drains have domes, strainers or covers which keep debris from clogging the roof drain pipe. These types of drains work via gravitational force funneling standing water through the roof drain system. They can be made from PVC, cast iron or cast aluminum.

Siphonic Roof Drains

Siphonic roof drains are a more efficient alternative to gravity drainage. Standard flat roof drainage permits both air and water to go into the drain system creating 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 of the air is removed, 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 installed on pitched roofs.

If you need more information about flat roof drain or cast iron roof drain in and around Piedmont, Alabama, give us a call. We'd be glad to help.