Roof Drains


At this time there are several different kinds of roof water drains and roof drain dome in Auburn, AL and each one is an unique answer to the wide range of roof types and their drainage issues. You must take into consideration the type of roof, its dimensions, and its roof pitch to be able to pick the right drain. You also should take into consideration the site of the drain, what amount of rainwater is anticipated and safe practices when choosing a roof drain for a home or commercial structure.

Hip roofs, dormers, gable and mansard roofs shed rainwater water due to gravitational force. Flat roofs, conversely, accumulate rain water. Until the water is routed out and away from the roof structure, it will create pools that could inevitably leak and the accumulated weight may subsequently cause damage to the structure. That is the reason that roofs with a pitch of under two percent should have roof drains positioned at the lowest areas on the roof in which water puddles and need to be uniformly spaced all throughout the roof top.

Roof Drain Kinds


There are a number of different alternatives of roof drains. They generally fall into 2 categories: pitched roof drains and flat roof drains. Pitched roof rainwater drains usually comprise gutters that collect rainwater which travels by means of gravity to the roof edge. Gutters channel this water towards 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 Drain Scuppers


Scuppers are located on a roof's periphery. They can also be placed on a balcony or terrace. Small openings are cut into the side of the roof structure so that water can empty and drain the roof top. Scuppers can connect to a downspout, or could be lengthened so that water is guided away from the structure sides and foundation.

Interior Roof Drains


There are many kinds of inner drains for flat roofs. These are positioned at low places in the roof and connect to interior drainage pipes that route water outdoors or into a sewer system. Several designs of inner roof drains have domes, strainers or covers that keep trash from blocking the roof drain pipe. These kinds of drains operate via gravitational force funneling pooling water through the roof drain system. They can be made 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 allows both air and water to go into the drain system producing pipe space occupied by both air and water. By incorporating an engineered baffle to the sump of the drain body it creates a siphonic drain that removes air from the system and permits 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 attracts 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 dome in and around Auburn, Alabama, give us a call. We'd be glad to help.