Roof Drains


There are a number of distinct kinds of roof water drains and roof drain pipe in Saraland, AL and each is an unique approach to the wide range of roof types and their drainage issues. You need to look at the type of roof, its dimensions, and its roof pitch to be able to choose the most suitable drain. You also may want to think about the site of the drain, what amount of rainwater is anticipated and safety when choosing a roof drain for a house or commercial structure.

Gambrel, dormers, hip and gable roofs shed rainwater water due to gravity. Flat roofs, alternatively, collect water. Unless the water is guided out and away from the roof structure, it will most likely create pools of water that could inevitably leak and the amassed weight may subsequently result in damage to the structure. 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 puddles and should be evenly spaced throughout the roof surface.

Roof Drain Types


There are several different alternatives of roof drains. They generally fall into two categories: flat roof drains and pitched roof drains. Pitched roof drains usually comprise gutters that collect rainwater which passes via gravity to the roof edge. Gutters direct this water in the direction of downspouts which steer 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 situated on a roof's perimeter. Scuppers can also be installed on a balcony or terrace. Small openings are cut into the side of the roof structure so that water can flow out and drain the roof surface. Scuppers can hook up to a downspout, or could be extended so that water is directed off of the building sides and foundation.

Interior Roof Drains


There are quite a few different types of inner drains for flat roofs. They are positioned at low spots on the roof and attach to inner drainage pipes that route water outside or in to a sewer system. Many models of internal roof drains have domes, strainers or covers which keep trash from obstructing the roof drain pipe. These types of drains work via gravitational force channeling standing water thru the roof drain system. They are made from PVC, cast iron or cast aluminum.

Siphonic Roof Drains

Siphonic roof drains are a more effective alternative to gravity drainage. Conventional flat roof drainage permits both air and water to go into the drain system producing 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 that removes air from the system and permits smaller 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 draws rainwater off the roof siphonically. Though 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 pipe in and around Saraland, Alabama, give us a call. We'd be glad to help.