Roof Drains


At this time there are a number of different varieties of roof water drains and roof drain pipe in Jasper, AL and each is a specific answer to the wide range of roof styles and their drainage issues. You should take into consideration the kind of roof, its dimensions, and the roof pitch to be able to choose the correct drain. You also need to think about the location of the drain, how much rainwater is anticipated and safe practices when selecting a roof drain for a residence or business structure.

Gambrel, dormers, hip and gable roofs shed water due to gravity. Flat roofs, conversely, collect rain water. Until this water is routed out and away from the flat roof , it will create pools of water that could eventually leak and the accumulated weight will eventually cause damage to the structure. That is why roofs with a pitch of under two percent ought to have roof drains positioned at the lowest areas on the roof where water puddles and should be evenly spread throughout the roof surface.

Types of Roof Drains


There are a number of distinct variations of roof drains. They basically fall into 2 groups: pitched roof drains and flat roof drains. Pitched roof drains usually comprise gutters which collect rainwater that travels via gravity to the roof periphery. Gutters transport this water in the direction of downspouts which route the water flow down and away from the building or into sewer lines. Flat roof drains can be one of three main types: scuppers, inner drains or siphonic drains.

Roof Rainwater Drain Scuppes


Scuppers are located on the roof's periphery. They can also be put in on a balcony or terrace. Small holes are cut into the side of the roof structure so water can empty and drain the roof surface. Scuppers can attach to a downspout, or can be lengthened so that water is directed away from the structure sides and foundation.

Inner Roof Drains


There are quite a few different kinds of inner drains for flat roofs. These are installed at low places on the roof and connect to inner drainage pipes that drive water outside or into a sewer system. Several versions of inner roof drains have domes, strainers or covers which prevent trash from blocking the roof drain pipe. These types of drains operate via gravity channeling pooling water thru the roof drain system. They can be constructed from PVC, cast iron or cast aluminum.

Siphonic Roof Drains

Siphonic roof drains are a more effective 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 incorporating an engineered baffle to the sump of the drain system it creates a siphonic drain which removes air from the system and permits smaller sized pipe diameters to be used. When all of the air is eliminated, a negative air pressure in the tail portion of the drain is set up which pulls water off the roof siphonically. Although used primarily 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 pipe in and around Jasper, Alabama, give us a call. We'd be glad to help.