There are several distinct types of roof drains and roof drain dome in Gadsden, AL and each one is an unique solution to the wide range of roof styles and their drainage challenges. You need to consider the kind of roof, its dimensions, and the roof pitch to be able to pick the correct drain. You also may want to take into consideration the location of the drain, how much rainwater is anticipated and safety when selecting a roof water drain for a home or business structure. Gambrel, dormers, hip and gable roofs shed rainwater water because of gravity. Flat roofs, on the other hand, collect rain water. Unless this water is directed out and away from the roof structure, it will create pools of water that may eventually leak and the accumulated weight will subsequently result in structural damage. That is the reason that roofs with a slope of less than two percent ought to have roof drains located at the lowest spots on the roof where water pools and should be evenly spread throughout the roof top.
Types of Roof Drains
There are a number of distinct variations of roof drains. They generally fall into 2 categories: pitched roof drains and flat roof drains. Pitched roof drains usually consist of gutters which collect rainwater that passes by means of gravity to the roof periphery. Gutters channel this water in the direction of downspouts which direct the water flow down and away from the structure or into sewers. Flat roof drains can be one of three main types: scuppers, inner drains or siphonic drains.
Roof Drain Scuppers
Scuppers are situated on a 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 water can flow out and drain the roof top. Scuppers can attach to a downspout, or can be lengthened to make sure that water is guided away from the structure sides and foundation.
Inner Roof Drains
There are many kinds of inner drains for flat roofs. They are installed at low spots in the roof and attach to interior drainage pipes that direct water outdoors or into a sewer system. Several designs 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 funneling standing water thru the roof drain system. They can be constructed from PVC, cast iron or cast aluminum.
Siphonic Roof DrainsSiphonic roof drains are a more efficient substitute for gravity drainage. Traditional flat roof drainage permits both air and water to enter the drain system creating pipe space which is occupied by both air and water. By incorporating an engineered baffle to the sump of the drain body it produces a siphonic drain that removes air from the system and allows for smaller sized pipe diameters . When all air is removed, a negative air pressure in the tail portion of the drain is established which attracts rainwater off the roof siphonically. Though used mainly for flat roofs, siphonic drains can also be installed on angled roofs.
If you need more information about flat roof drain or roof drain dome in and around Gadsden, Alabama, give us a call. We'd be glad to help.