Roof Drains


At this time there are a number of different types of roof water drains and roof drain scupper in Prattville, AL and each one is an unique answer to the variety of roof styles and their drainage challenges. You should think about the type of roof, its size, and its roof pitch to be able to choose the correct drain. You also should think about the location of the drain, what amount of rainwater is expected and safety when choosing a roof drain for a home or commercial building.

Hip roofs, dormers, gable and mansard roofs shed rainwater water because of gravity. Flat roofs, alternatively, accumulate rain water. Until this water is routed out and away from the roof , it will most likely create pools of water that could inevitably leak and the amassed weight will eventually result in structural damage. That is why roofs with a pitch of below two percent ought to have roof drains situated at the lowest spots on the roof in which water puddles and need to be uniformly spaced all throughout the roof top.

Types of Roof Drains


There are a number of different alternatives of roof drains. They generally fall into two groups: flat roof drains and pitched roof drains. Pitched roof drains usually comprise gutters that accumulate rainwater which travels by means of gravity to the roof edge. Gutters direct this water towards downspouts which route the water flow down and away from the structure or in to sewer lines. Flat roof drains are one of three primary types: scuppers, inner drains or siphonic drains.

Roof Rainwater Drain Scuppes


Scuppers are situated on the roof's periphery. They can also be put in on a balcony or terrace. Small holes are cut in the side of the roof structure so that water can flow out and drain the roof surface. Scuppers can attach to a downspout, or can be extended to make sure that water is directed off of the building sides and foundation.

Interior Roof Drains


There are quite a few different kinds of inner drains for flat roofs. These are positioned at low areas in the roof and connect to inner drainage pipes that direct water outside or in to a sewer system. Many versions of inner roof drains have domes, strainers or covers that prevent debris from obstructing the roof drain pipe. These kinds of drains work via gravity funneling standing 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. Standard 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 which eliminates air from the system and permits smaller pipe diameters to be used. When all air is eliminated, a negative air pressure in the tail piece of the drain is set up which attracts water off the roof siphonically. Though used primarily for flat roofs, siphonic drains can also be installed on angled roofs.

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