Roof Drains


At this time there are a number of different kinds of roof water drains and roof drain strainer in Grand Bay, AL and each one is an unique approach to the wide range of roof types and their drainage concerns. You need to consider the kind of roof, its dimensions, and the roof pitch to be able to select the most suitable drain. You also should take into consideration the site of the drain, how much rainwater is anticipated and safety when selecting a roof water drain for a home or commercial building.

Gable, dormer, mansard and hip roofs shed rainwater water due to gravity. Flat roofs, on the other hand, collect water. Unless the water is guided out and away from the flat roof , it will most likely develop pools of water that could inevitably leak and the accumulated weight may subsequently result in damage to the structure. That is the reason that roofs with a pitch of under 2% ought to have roof drains situated in the lowest places on the roof in which water pools and need to be evenly spaced throughout the roof surface.

Roof Drain Kinds


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 rainwater drains usually consist of gutters that accumulate rainwater which travels by means of gravity down to the roof periphery. Gutters direct this water towards downspouts which steer the water flow down and away from the building or in to sewers. Flat roof drains can be one of three main types: scuppers, inner drains or siphonic drains.

Roof Drain Scuppers


Scuppers are situated on the roof's periphery. Scuppers can also be placed on a balcony or terrace. Small holes are cut into the side of the roof structure so that rain water can flow out and drain the roof surface. Scuppers can attach to a downspout, or could be extended so that water is guided away from the structure sides and foundation.

Interior Roof Drains


There are many types of inner drains for flat roofs. They are installed at low places in the roof and connect to interior drainage pipes that drive water outdoors or into a sewer system. Many designs of internal roof drains have domes, strainers or covers which prevent trash from blocking the roof drain pipe. These kinds of drains operate via gravitational force channeling 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 efficient substitute for gravity drainage. Traditional flat roof drainage permits both air and water to enter the drain system producing pipe space which is occupied by both air and water. By adding an engineered baffle to the sump of the drain body it produces a siphonic drain which removes air from the system and allows for smaller sized pipe diameters to be used. When all of the air is removed, a negative air pressure in the tail portion of the drain is established which draws water off the roof siphonically. Though used mainly 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 strainer in and around Grand Bay, Alabama, give us a call. We'd be glad to help.