Roof Drains


At this time there are a few different kinds of roof water drains and roof drain pipe in Madison, AL and each one is an unique approach to the wide range of roof types and their drainage concerns. You should think about the type of roof, its dimensions, and its roof pitch to be able to select the right drain. You also need to take into account the location of the drain, how much rainwater is anticipated and safety when selecting a roof drain for a home or commercial structure.

Gambrel, dormers, hip and gable roofs shed rainwater water thanks to gravity. Flat roofs, conversely, collect water. Until the water is guided out and away from the flat roof , it will most likely create pools of water that may eventually leak and the accumulated weight may eventually cause damage to the structure. That is the reason that roofs with a slope of under two percent should have roof drains positioned in the lowest places on the roof where water pools and need to be evenly spread throughout the roof top.

Types of Roof Drains


There are a number of distinct alternatives of roof drains. They basically fall into 2 categories: flat roof drains and pitched roof drains. Pitched roof rainwater drains usually comprise gutters that accumulate rainwater which travels via gravity down to the roof edge. Gutters channel this water in the direction of downspouts which route the water flow down and far 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 the roof's perimeter. Scuppers can also be installed on a balcony or terrace. Small holes are cut into the side of the roof structure so that water can empty and drain the roof top. Scuppers can connect to a downspout, or can be extended to make sure that water is directed off of the structure sides and foundation.

Interior Roof Drains


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

Siphonic Roof Drains

Siphonic roof drains are a more effective alternative to gravity drainage. Standard flat roof drainage allows 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 system it produces a siphonic drain that 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 portion of the drain is set up which draws water off the roof siphonically. Though used primarily 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 pipe in and around Madison, Alabama, give us a call. We'd be glad to help.