Roof Drains


At this time there are a few different kinds of roof drains and roof drain pvc in Auburn, AL and each is an unique answer to the wide range of roof types and their drainage issues. You must think about the kind of roof, its dimensions, and its roof pitch to be able to choose the correct drain. You also need to take into consideration the site of the drain, how much rainwater is expected and safe practices when choosing a roof drain for a house or commercial building.

Hip roofs, dormers, gable and mansard roofs shed water thanks to gravitational force. Flat roofs, conversely, collect water. Unless this water is directed out and away from the flat roof structure, it will create pools that could inevitably leak and the accumulated weight may eventually result in damage to the structure. That is why roofs with a pitch of under 2% ought to have roof drains positioned at the lowest areas on the roof where water pools and should be evenly spread all throughout the roof surface.

Types of Roof Drains


There are a number of distinct alternatives of roof drains. They generally fall into 2 groups: pitched roof drains and flat roof drains. Pitched roof drains normally consist of gutters which accumulate rainwater that travels by means of gravity down to the roof edge. Gutters transport this water in the direction of downspouts which steer 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 located on the 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 that rain water can flow out and drain the roof surface. Scuppers can hook up to a downspout, or can be extended so that water is guided away from the building sides and foundation.

Interior Roof Drains


There are many kinds of inner drains for flat roofs. These are positioned at low places on the roof and connect to interior drainage pipes that route water outdoors or in to a sewer system. Many models of inner roof drains have domes, strainers or covers that keep trash from clogging the roof drain pipe. These kinds of drains work via gravity 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 permits both air and water to enter the drain system creating pipe space which is 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 to be used. When all air is removed, a negative air pressure in the tail portion of the drain is set up which pulls rainwater off the roof siphonically. Though used primarily for flat roofs, siphonic drains can also be installed on pitched roofs.

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