Roof Drains


There are several distinct types of roof water drains and roof drain pvc in Piedmont, AL and each is a specific solution to the variety of roof types and their drainage issues. You must consider the type of roof, its size, and the roof pitch to be able to choose the most suitable drain. You also may want to think about the location of the drain, what amount of rainwater is anticipated and safe practices when choosing a roof drain for a residence or commercial building.

Hip roofs, dormers, gable and mansard roofs shed water due to gravity. Flat roofs, conversely, collect water. Until this water is guided out and away from the flat roof structure, it will develop pools that may eventually leak and the amassed weight may subsequently cause damage to the structure. That is why roofs with a pitch of under 2% ought to have roof drains positioned in the lowest places on the roof where water puddles and need to be evenly spread all throughout the roof surface.

Roof Drain Types


There are a number of distinct alternatives of roof drains. They generally fall into two groups: flat roof drains and pitched roof drains. Pitched roof drains usually comprise gutters that collect rainwater that travels by means of gravity to the roof periphery. Gutters transport this water towards downspouts which direct 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 Drain Scuppers


Scuppers are located on a roof's perimeter. Scuppers can also be put in 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 top. Scuppers can attach to a downspout, or can be lengthened so that water is guided away from the structure sides and foundation.

Interior Roof Drains


There are many types of inner drains for flat roofs. These are positioned at low areas on the roof and connect to interior drainage pipes that drive water outside or in to a sewer system. Many versions of inner roof drains have domes, strainers or covers that prevent debris from blocking the roof drain pipe. These types of drains operate via gravitational force funneling standing 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 alternative to gravity drainage. Standard flat roof drainage allows 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 creates a siphonic drain that removes air from the system and allows for smaller pipe diameters . When all air is removed, a negative air pressure in the tail portion of the drain is set up which pulls water off the roof siphonically. Although 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 pvc in and around Piedmont, Alabama, give us a call. We'd be glad to help.