Roof Drains


At this time there are a number of distinct types of roof water drains and roof drain system in Northport, AL and each one is a specific approach to the wide range of roof types and their drainage concerns. You must take into consideration 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, how much rainwater is anticipated and safety when selecting a roof water drain for a home or commercial structure.

Gambrel, dormers, hip and gable roofs shed water due to gravity. Flat roofs, conversely, accumulate rain water. Until the water is routed out and away from the roof structure, it will most likely create pools that could eventually leak and the accumulated weight may subsequently cause structural damage. That is the reason that roofs with a slope of below two percent ought to have roof drains positioned in the lowest places on the roof where water pools and need to be evenly spread throughout the roof surface.

Roof Drain Types


There are a number of distinct alternatives of roof drains. They generally fall into two groups: flat roof drains and pitched roof drains. Pitched roof rainwater drains usually comprise gutters that accumulate rainwater that passes via gravity down to the roof edge. Gutters channel this water in the direction of downspouts which direct the water flow down and away from the structure or into sewer lines. Flat roof drains can be one of three primary types: scuppers, inner drains or siphonic drains.

Roof Rainwater Drain Scuppes


Scuppers are located on a roof's periphery. Scuppers can also be put in on a balcony or terrace. Small holes are cut in the side of the roof structure so rain water can empty and drain the roof top. Scuppers can attach to a downspout, or could be lengthened so that water is guided off of the structure sides and foundation.

Interior Roof Drains


There are many types of inner drains for flat roofs. They are installed at low places on the roof and connect to inner drainage pipes that direct water outside or into a sewer system. Many versions of internal roof drains have domes, strainers or covers which keep trash from obstructing the roof drain pipe. These kinds of drains work via gravity channeling standing water through the roof drain system. They can be constructed from PVC, cast iron or cast aluminum.

Siphonic Roof Drains

Siphonic roof drains are a more efficient alternative to gravity drainage. Traditional flat roof drainage allows both air and water to enter the drain system creating pipe space occupied by both air and water. By adding an engineered baffle to the sump of the drain system it creates a siphonic drain which eliminates air from the system and permits smaller pipe diameters . When all of the air is eliminated, a negative air pressure in the tail piece of the drain is established which draws rainwater off the roof siphonically. Although used mainly for flat roofs, siphonic drains can also be set up on angled roofs.

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