There are several different kinds of roof drains and roof drain pan in Attalla, AL and each one is an unique approach to the wide range of roof types and their drainage issues. You need to think about the kind of roof, its dimensions, and its roof pitch to be able to pick the correct drain. You also should think about the location of the drain, how much rainwater is anticipated and safety when choosing a roof drain for a house or business structure. Gambrel, dormers, hip and gable roofs shed water thanks to gravity. Flat roofs, on the other hand, collect rain water. Unless this water is directed out and away from the roof , it will develop pools of water that could inevitably leak and the accumulated weight may subsequently cause damage to the structure. That is why roofs with a slope of under two percent ought to have roof drains positioned in the lowest spots on the roof in which water pools and need to be uniformly spread all throughout the roof surface.
Roof Drain Types
There are several different alternatives of roof drains. They generally fall into 2 categories: pitched roof drains and flat roof drains. Pitched roof drains normally comprise gutters which accumulate rainwater that travels via gravity down to the roof edge. Gutters channel this water in the direction of downspouts which direct the water flow down and far away from the structure or in to sewer lines. Flat roof drains can be one of three main types: scuppers, inner drains or siphonic drains.
Roof Drain Scuppers
Scuppers are located on the roof's periphery. They can also be placed on a balcony or terrace. Small openings are cut in the side of the roof structure so that water can flow out and drain the roof surface. Scuppers can connect to a downspout, or can be extended to make sure that water is directed away from the building sides and foundation.
Interior Roof Drains
There are many kinds of inner drains for flat roofs. They are positioned at low areas on the roof and attach to interior drainage pipes that drive water outside or in to a sewer system. Several designs of inner roof drains have domes, strainers or covers that prevent trash from obstructing the roof drain pipe. These kinds of drains operate via gravity funneling standing water through the roof drain system. They are made from PVC, cast iron or cast aluminum.
Siphonic Roof DrainsSiphonic roof drains are a more effective substitute for 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 which removes air from the system and permits smaller sized pipe diameters . When all of the air is eliminated, a negative air pressure in the tail piece of the drain is established which draws water off the roof siphonically. Although used primarily for flat roofs, siphonic drains can also be set up on angled roofs.
If you need more information about flat roof drain or roof drain pan in and around Attalla, Alabama, give us a call. We'd be glad to help.