Roof Drains


At this time there are several distinct types of roof water drains and roof drain pan in Oneonta, AL and each one is a specific answer to the variety of roof types and their drainage challenges. You need to look at the type of roof, its size, and its roof pitch to be able to choose the right drain. You also may want to think about the location of the drain, how much rainwater is anticipated and safe practices when choosing a roof drain for a house or business structure.

Hip roofs, dormers, gable and mansard roofs shed rainwater water due to gravity. Flat roofs, on the other hand, collect water. Unless this water is routed out and away from the roof , it will most likely develop pools of water that may inevitably leak and the amassed weight will subsequently cause structural damage. That is why roofs with a pitch of less than 2% ought to have roof drains located at the lowest spots on the roof where water pools and should be evenly spread throughout the roof top.

Roof Drain Kinds


There are several different variations of roof drains. They generally fall into two categories: flat roof drains and pitched roof drains. Pitched roof rainwater drains normally consist of gutters which collect rainwater that travels via gravity to the roof edge. Gutters transport this water in the direction of downspouts which route the water flow down and far away from the building or into sewers. Flat roof drains are one of three primary types: scuppers, inner drains or siphonic drains.

Roof Rainwater Drain Scuppes


Scuppers are located on the roof's perimeter. They can also be installed on a balcony or terrace. Small holes are cut in the side of the roof structure so that water can empty and drain the roof top. Scuppers can hook up to a downspout, or can be extended to make sure that water is guided away from the building sides and foundation.

Inner Roof Drains


There are quite a few different types of inner drains for flat roofs. They are positioned at low spots on the roof and attach to interior drainage pipes that direct water outside or into a sewer system. Many styles of internal roof drains have domes, strainers or covers which keep debris from blocking the roof drain pipe. These kinds of drains work via gravitational force funneling pooling water thru the roof drain system. They can be made from PVC, cast iron or cast aluminum.

Siphonic Roof Drains

Siphonic roof drains are a more effective alternative to gravity drainage. Conventional flat roof drainage permits 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 body it produces a siphonic drain that eliminates air from the system and permits smaller sized pipe diameters . When all of the air is eliminated, 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 installed on angled roofs.

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