Roof Drains


There are several distinct varieties of roof drains and roof drain pan in Montevallo, AL and each is an unique answer to the variety of roof styles and their drainage concerns. You should think about the kind of roof, its dimensions, and the roof pitch to be able to choose the correct drain. You also should think about the site of the drain, what amount of rainwater is expected and safe practices when choosing a roof water drain for a house or business building.

Gambrel, dormers, hip and gable roofs shed water thanks to gravitational force. Flat roofs, on the other hand, collect water. Unless the water is directed out and away from the flat roof structure, it will create pools of water that could inevitably leak and the accumulated weight will subsequently cause damage to the structure. That is why roofs with a pitch of under two percent ought to have roof drains located in the lowest spots on the roof where water puddles and need to be evenly spread all throughout the roof top.

Types of Roof Drains


There are several distinct variations of roof drains. They basically fall into 2 groups: pitched roof drains and flat roof drains. Pitched roof rainwater drains usually comprise gutters which collect rainwater which travels by means of gravity to the roof edge. Gutters transport this water towards downspouts which direct the water flow down and away from the structure or into sewer lines. Flat roof drains can be one of three primary types: scuppers, inner drains or siphonic drains.

Roof Rainwater Drain Scuppes


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

Inner Roof Drains


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

Siphonic Roof Drains

Siphonic roof drains are a more efficient substitute for gravity drainage. Traditional flat roof drainage permits both air and water to enter the drain system creating pipe space occupied by both air and water. By adding an engineered baffle to the sump of the drain system it produces a siphonic drain that removes air from the system and permits smaller pipe diameters . When all of the air is removed, a negative air pressure in the tail piece of the drain is established which draws water off the roof siphonically. Though used primarily 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 pan in and around Montevallo, Alabama, give us a call. We'd be glad to help.