Roof Drains


There are several distinct kinds of roof drains and roof drain system in Decatur, AL and each one is an unique answer to the variety of roof types and their drainage issues. You should think about the type of roof, its size, and the roof pitch to be able to pick the most suitable drain. You also need to think about the site of the drain, what amount of rainwater is expected and safety when selecting a roof drain for a residence or business building.

Gable, dormer, mansard and hip roofs shed water because of gravity. Flat roofs, alternatively, accumulate water. Until the water is guided out and away from the flat roof , it will create pools that may inevitably leak and the accumulated weight will subsequently result in compromising the integrity of the structure. That is why roofs with a slope of below 2% ought to have roof drains situated at the lowest areas on the roof in which water pools and need to be evenly spaced all throughout the roof surface.

Kinds of Roof Drains


There are a number of distinct alternatives of roof drains. They generally fall into 2 categories: pitched roof drains and flat roof drains. Pitched roof drains usually comprise gutters which accumulate rainwater that passes via gravity down to the roof periphery. Gutters channel this water towards downspouts which direct the water flow down and far 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 periphery. Scuppers can also be placed on a balcony or terrace. Small holes are cut in the side of the roof structure so that water can flow out and drain the roof surface. Scuppers can attach 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. They are installed at low areas on the roof and attach to interior drainage pipes that drive water outside or into a sewer system. Several models of internal roof drains have domes, strainers or covers that keep debris from blocking the roof drain pipe. These types of drains operate via gravity channeling pooling 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. Standard 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 body it produces a siphonic drain that removes air from the system and allows for smaller pipe diameters to be used. When all air is removed, a negative air pressure in the tail piece of the drain is established which pulls water 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 system in and around Decatur, Alabama, give us a call. We'd be glad to help.