Roof Drains


At this time there are a number of distinct varieties of roof drains and roof drain scupper in Killen, AL and each one is a specific approach to the wide range of roof types and their drainage concerns. You must look at the type of roof, its size, and the roof pitch to be able to pick the most suitable drain. You also may want to take into consideration the site of the drain, what amount of rainwater is expected and safe practices when selecting a roof drain for a home or commercial structure.

Gambrel, dormers, hip and gable roofs shed rainwater water due to gravity. Flat roofs, on the other hand, collect rain water. Unless this water is routed out and away from the roof structure, it will develop pools of water that could eventually leak and the amassed weight may subsequently cause damage to the structure. That is the reason that roofs with a slope of under two percent ought to have roof drains situated in the lowest spots on the roof in which water pools and need to be evenly spaced all throughout the roof surface.

Roof Drain Kinds


There are a number of different alternatives of roof drains. They basically fall into two groups: flat roof drains and pitched roof drains. Pitched roof drains usually comprise gutters which collect rainwater that travels by means of gravity to the roof periphery. Gutters direct this water towards downspouts which route the water flow down and far away from the structure 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 located on a roof's perimeter. Scuppers can also be put in on a balcony or terrace. Small openings are cut into the side of the roof structure so that water can empty and drain the roof surface. Scuppers can attach to a downspout, or can be lengthened so that water is guided off of the building sides and foundation.

Interior Roof Drains


There are many kinds of inner drains for flat roofs. These are installed at low places on the roof and connect to inner drainage pipes that direct water outdoors or into a sewer system. Several versions of internal roof drains have domes, strainers or covers that prevent trash from blocking the roof drain pipe. These types of drains work via gravitational force channeling pooling water through the roof drain system. They are constructed from PVC, cast iron or cast aluminum.

Siphonic Roof Drains

Siphonic roof drains are a more efficient substitute for gravity drainage. Traditional flat roof drainage allows both air and water to enter the drain system creating pipe space which is occupied by both air and water. By adding an engineered baffle to the sump of the drain system it produces a siphonic drain which removes air from the system and permits smaller pipe diameters . When all air is removed, a negative air pressure in the tail piece of the drain is set up which pulls water off the roof siphonically. Though used mainly for flat roofs, siphonic drains can also be set up on pitched roofs.

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