There are a few distinct types of roof drains and roof drain strainer in Alabaster, AL and each is a specific approach to the wide range of roof styles and their drainage issues. You must consider the kind of roof, its size, and its roof pitch to be able to pick the right drain. You also need to think about the location of the drain, what amount of rainwater is expected and safety when choosing a roof drain for a home or commercial building. Hip roofs, dormers, gable and mansard roofs shed water due to gravitational force. Flat roofs, conversely, collect water. Unless the water is directed out and away from the roof , it will develop pools that could eventually leak and the accumulated weight will subsequently result in structural damage. That is the reason that roofs with a pitch of below two percent should have roof drains positioned in the lowest spots on the roof where water puddles and should be uniformly spread all throughout the roof top.
Roof Drain Kinds
There are several distinct variations of roof drains. They generally fall into 2 categories: flat roof drains and pitched roof drains. Pitched roof drains normally comprise gutters that collect rainwater that passes by means of gravity down to the roof edge. Gutters transport this water in the direction of downspouts which steer the water flow down and far away from the structure or into sewer lines. Flat roof drains can be one of three main types: scuppers, inner drains or siphonic drains.
Roof Rainwater Drain Scuppes
Scuppers are situated on the roof's periphery. They 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 empty and drain the roof surface. Scuppers can connect to a downspout, or could be lengthened so that water is directed away from the structure sides and foundation.
Interior Roof Drains
There are quite a few different kinds of inner drains for flat roofs. They are installed at low places in the roof and attach to inner drainage pipes that drive water outdoors or in to a sewer system. Several styles of inner roof drains have domes, strainers or covers that prevent debris from blocking the roof drain pipe. These kinds of drains operate via gravity funneling standing water thru the roof drain system. They are made from PVC, cast iron or cast aluminum.
Siphonic Roof DrainsSiphonic roof drains are a more effective alternative to 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 incorporating an engineered baffle to the sump of the drain body it produces a siphonic drain that eliminates air from the system and permits smaller sized pipe diameters to be used. When all air is eliminated, a negative air pressure in the tail piece of the drain is set up which pulls water off the roof siphonically. Although used mainly 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 strainer in and around Alabaster, Alabama, give us a call. We'd be glad to help.