Roof Drains


There are several distinct varieties of roof drains and roof drain dome in Jacksonville, AL and each is an unique solution to the variety of roof types and their drainage concerns. You should think about the kind of roof, its size, and the roof pitch to be able to select the correct drain. You also should take into consideration the site of the drain, how much rainwater is anticipated and safe practices when choosing a roof drain for a house or commercial structure.

Gable, dormer, mansard and hip roofs shed rainwater water due to gravitational force. Flat roofs, conversely, accumulate water. Until the water is guided out and away from the roof , it will develop pools of water that could eventually leak and the amassed weight may subsequently result in compromising the integrity of the structure. That is the reason that roofs with a pitch of below 2% ought to have roof drains located at the lowest areas on the roof where water puddles and need to be evenly spaced throughout the roof surface.

Roof Drain Kinds


There are a number of different variations of roof drains. They generally fall into 2 categories: flat roof drains and pitched roof drains. Pitched roof rainwater drains usually consist of gutters that collect rainwater that passes via gravity down to the roof edge. Gutters direct this water towards downspouts which direct the water flow down and far away from the building or in to sewer lines. Flat roof drains are one of three main types: scuppers, inner drains or siphonic drains.

Roof Rainwater Drain Scuppes


Scuppers are situated on a roof's periphery. They can also be installed on a balcony or terrace. Small holes are cut into the side of the roof structure so rain water can empty and drain the roof surface. Scuppers can hook up to a downspout, or can be lengthened so that water is directed away from 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 connect to inner drainage pipes that route water outdoors or in to a sewer system. Many styles of inner roof drains have domes, strainers or covers which prevent trash from clogging the roof drain pipe. These types of drains operate via gravity funneling standing water through the roof drain system. They are made of 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 go into 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 that removes air from the system and permits smaller pipe diameters . When all of the air is eliminated, a negative air pressure in the tail piece of the drain is established which pulls rainwater off the roof siphonically. Although 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 dome in and around Jacksonville, Alabama, give us a call. We'd be glad to help.