Roof Drains


There are several different types of roof drains and roof drain cover in Prattville, AL and each one is an unique solution to the variety of roof types and their drainage challenges. You should consider the kind of roof, its dimensions, and the roof pitch to be able to choose the most suitable drain. You also may want to think about the site of the drain, how much rainwater is anticipated and safe practices when selecting a roof water drain for a home or commercial building.

Hip roofs, dormers, gable and mansard roofs shed water due to gravitational force. Flat roofs, alternatively, accumulate rain water. Until the water is directed out and away from the roof , it will develop pools of water that could eventually leak and the accumulated weight will eventually result in structural damage. That is why roofs with a pitch of under 2% ought to have roof drains situated at the lowest spots on the roof in which water pools and should be evenly spread all throughout the roof top.

Kinds of Roof Drains


There are several distinct variations of roof drains. They generally fall into two categories: pitched roof drains and flat roof drains. Pitched roof drains normally consist of gutters which accumulate rainwater which travels by means of gravity down to the roof periphery. Gutters channel this water in the direction of downspouts which steer the water flow down and far away from the building or in to sewer lines. 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. They can also be installed on a balcony or terrace. Small holes are cut in the side of the roof structure so that rain water can empty and drain the roof top. Scuppers can connect 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 types of inner drains for flat roofs. These are installed at low areas on the roof and attach to interior drainage pipes that route water outdoors or in to a sewer system. Many versions of inner roof drains have domes, strainers or covers which keep debris from blocking the roof drain pipe. These types of drains work 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 efficient substitute for gravity drainage. Conventional 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 permits smaller pipe diameters to be used. When all of the air is removed, a negative air pressure in the tail portion of the drain is set up which attracts water off the roof siphonically. Though used mainly for flat roofs, siphonic drains can also be installed on pitched roofs.

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