Roof Drains


There are several different varieties of roof water drains and cast iron roof drain in Harvest, AL and each one is a specific approach to the wide range of roof styles and their drainage concerns. You must take into consideration the kind of roof, its size, and its roof pitch to be able to select the correct drain. You also need to take into consideration the site of the drain, how much rainwater is expected and safe practices when choosing a roof water drain for a house or business building.

Gambrel, dormers, hip and gable roofs shed rainwater water because of gravity. Flat roofs, on the other hand, accumulate rain water. Until the water is guided out and away from the roof , it will most likely develop pools that could eventually leak and the amassed weight will subsequently result in structural damage. That is why roofs with a slope of under 2% should have roof drains situated in the lowest places on the roof where water pools and should be evenly spread throughout the roof surface.

Kinds of Roof Drains


There are several distinct alternatives of roof drains. They generally fall into 2 groups: flat roof drains and pitched roof drains. Pitched roof drains normally comprise gutters which collect rainwater which travels via gravity to the roof periphery. Gutters channel this water towards downspouts which direct 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 Rainwater Drain Scuppes


Scuppers are situated on a roof's perimeter. Scuppers can also be installed on a balcony or terrace. Small holes are cut into the side of the roof structure so that water can empty and drain the roof surface. Scuppers can connect to a downspout, or can be extended to make sure that water is guided off of the structure sides and foundation.

Inner Roof Drains


There are many types of inner drains for flat roofs. These are positioned at low places in the roof and attach to interior drainage pipes that direct water outdoors or in to a sewer system. Several models of internal roof drains have domes, strainers or covers that prevent trash from clogging the roof drain pipe. These types of drains operate via gravity channeling 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 substitute for gravity drainage. Standard flat roof drainage allows both air and water to go into 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 creates a siphonic drain that removes air from the system and permits smaller pipe diameters . When all of the air is removed, a negative air pressure in the tail portion of the drain is set up which attracts rainwater off the roof siphonically. Though used primarily 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 Harvest, Alabama, give us a call. We'd be glad to help.