Roof Drains


There are several different types of roof water drains and roof drain pvc in Montevallo, AL and each one is a specific solution to the wide range of roof styles and their drainage challenges. You should take into consideration the type of roof, its dimensions, and the roof pitch to be able to select the right drain. You also should take into account the site of the drain, how much rainwater is anticipated and safe practices when choosing a roof drain for a home or commercial structure.

Gambrel, dormers, hip and gable roofs shed rainwater water due to gravity. Flat roofs, on the other hand, accumulate water. Until this water is directed out and away from the roof , it will create pools of water that may inevitably leak and the accumulated weight will eventually cause compromising the integrity of the structure. That is the reason that roofs with a pitch of under two percent ought to have roof drains positioned at the lowest spots on the roof in which water puddles and should be evenly spaced throughout the roof surface.

Kinds of Roof Drains


There are a number of different alternatives of roof drains. They generally fall into two categories: pitched roof drains and flat roof drains. Pitched roof rainwater drains usually comprise gutters which accumulate rainwater that passes via gravity down to the roof periphery. Gutters transport this water towards downspouts which direct the water flow down and away from the structure or in to sewers. Flat roof drains can be one of three main types: scuppers, inner drains or siphonic drains.

Roof Rainwater Drain Scuppes


Scuppers are located on a roof's periphery. Scuppers can also be put in on a balcony or terrace. Small holes are cut into 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 lengthened to make sure that water is directed off of the building sides and foundation.

Inner Roof Drains


There are quite a few different kinds of inner drains for flat roofs. These are installed at low spots in the roof and attach to inner drainage pipes that direct water outdoors or into a sewer system. Several styles of internal roof drains have domes, strainers or covers which keep debris from obstructing the roof drain pipe. These kinds of drains work via gravitational force funneling pooling water thru the roof drain system. They can be constructed from PVC, cast iron or cast aluminum.

Siphonic Roof Drains

Siphonic roof drains are a more efficient alternative to gravity drainage. Conventional flat roof drainage allows both air and water to enter the drain system producing pipe space which is occupied by both air and water. By incorporating an engineered baffle to the sump of the drain system it produces a siphonic drain that eliminates air from the system and permits smaller sized pipe diameters to be used. When all of the air is eliminated, a negative air pressure in the tail portion of the drain is established which draws water off the roof siphonically. Though used mainly for flat roofs, siphonic drains can also be set up on pitched roofs.

If you need more information about flat roof drain or roof drain pvc in and around Montevallo, Alabama, give us a call. We'd be glad to help.