Roof Drains


There are several different types of roof drains and roof drain downspout in Gardendale, AL and each one is a specific solution to the wide range of roof types and their drainage concerns. You must think about the kind of roof, its size, and its roof pitch to be able to pick the correct drain. You also may want to think about the location of the drain, how much rainwater is anticipated and safety when selecting a roof water drain for a residence or business structure.

Hip roofs, dormers, gable and mansard roofs shed water thanks to gravity. Flat roofs, conversely, accumulate rain water. Unless this water is guided out and away from the flat roof , it will most likely develop pools that could inevitably leak and the amassed weight will eventually cause structural damage. That is why roofs with a pitch of less than 2% ought to have roof drains situated at the lowest spots on the roof where water puddles and need to be evenly spaced throughout the roof surface.

Types of Roof Drains


There are several different variations of roof drains. They generally fall into two groups: flat roof drains and pitched roof drains. Pitched roof rainwater drains usually comprise gutters which accumulate rainwater that travels via gravity down to the roof edge. Gutters transport this water in the direction of downspouts which route the water flow down and away from the building or into sewers. Flat roof drains can be one of three main 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 openings are cut into the side of the roof structure so rain water can flow out and drain the roof surface. Scuppers can hook up to a downspout, or could be extended to make sure that water is guided off of the structure sides and foundation.

Interior Roof Drains


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

Siphonic Roof Drains

Siphonic roof drains are a more effective substitute for gravity drainage. Conventional flat roof drainage permits both air and water to enter the drain system producing 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 that removes air from the system and allows for smaller sized pipe diameters to be used. When all of the air is removed, a negative air pressure in the tail piece of the drain is set up which pulls rainwater off the roof siphonically. Though 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 downspout in and around Gardendale, Alabama, give us a call. We'd be glad to help.