Roof Drains


At this time there are several distinct kinds of roof water drains and roof drain scupper in Moulton, AL and each one is a specific approach to the variety of roof styles and their drainage issues. You should take into consideration the type of roof, its size, and its roof pitch to be able to pick the most suitable drain. You also should take into consideration the location of the drain, what amount of rainwater is anticipated and safe practices when selecting a roof drain for a residence or business structure.

Gambrel, dormers, hip and gable roofs shed rainwater water due to gravitational force. Flat roofs, on the other hand, accumulate water. Unless the water is guided out and away from the flat roof , it will create pools of water that could inevitably leak and the accumulated weight will subsequently cause structural damage. That is why roofs with a slope of below two percent should have roof drains positioned in the lowest areas on the roof where water puddles and need to be evenly spaced 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 usually comprise gutters that collect rainwater which passes by means of gravity to the roof periphery. Gutters channel 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 primary types: scuppers, inner drains or siphonic drains.

Roof Rainwater Drain Scuppes


Scuppers are situated 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 empty and drain the roof top. Scuppers can hook up 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 types of inner drains for flat roofs. These are positioned at low places on the roof and attach to inner drainage pipes that direct water outside or into a sewer system. Several versions of inner roof drains have domes, strainers or covers that keep debris from blocking the roof drain pipe. These types of drains operate via gravitational force channeling pooling 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. 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 eliminates air from the system and permits smaller sized pipe diameters to be used. When all air is eliminated, a negative air pressure in the tail portion of the drain is set up which draws rainwater off the roof siphonically. Though used primarily for flat roofs, siphonic drains can also be set up on pitched roofs.

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