There are a number of distinct types of roof water drains and roof drain downspout in Hartselle, AL and each one is a specific approach to the variety of roof types and their drainage concerns. You should look at the type of roof, its dimensions, and its roof pitch to be able to select the correct drain. You also need to take into account the site of the drain, how much rainwater is anticipated and safety when choosing a roof water drain for a house or commercial building. Gable, dormer, mansard and hip roofs shed water because of gravity. Flat roofs, alternatively, collect rain water. Until the water is directed out and away from the flat roof , it will create pools that may inevitably leak and the accumulated weight may subsequently result in structural damage. That is the reason that roofs with a slope of under two percent ought to have roof drains located at the lowest spots on the roof where water pools and should be uniformly spread all throughout the roof surface.
Roof Drain Kinds
There are several different alternatives of roof drains. They basically fall into two groups: pitched roof drains and flat roof drains. Pitched roof drains normally consist of gutters which accumulate rainwater that travels via gravity to the roof edge. Gutters transport this water in the direction of downspouts which route the water flow down and far away from the building or in to sewers. Flat roof drains are one of three primary types: scuppers, inner drains or siphonic drains.
Roof Drain Scuppers
Scuppers are situated on the roof's perimeter. They can also be placed on a balcony or terrace. Small holes are cut in the side of the roof structure so water can empty and drain the roof surface. Scuppers can attach to a downspout, or can be extended so that water is directed off of the structure sides and foundation.
Interior Roof Drains
There are many types of inner drains for flat roofs. These are positioned at low spots in the roof and connect to interior drainage pipes that drive water outdoors or in to a sewer system. Many styles of inner roof drains have domes, strainers or covers which prevent trash from obstructing the roof drain pipe. These types of drains work via gravitational force 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 efficient alternative to gravity drainage. Standard flat roof drainage allows 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 creates a siphonic drain that eliminates air from the system and permits smaller sized pipe diameters to be used. When all of the air is removed, a negative air pressure in the tail piece of the drain is set up which draws water 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 downspout in and around Hartselle, Alabama, give us a call. We'd be glad to help.