Roof Drains


At this time there are a number of different kinds of roof water drains and roof drain pipe in Jacksonville, AL and each is a specific approach to the wide range of roof styles and their drainage challenges. You should think about the kind of roof, its dimensions, and its roof pitch to be able to pick the correct drain. You also may want to think about the location of the drain, how much rainwater is expected and safe practices when choosing a roof drain for a home or business building.

Gable, dormer, mansard and hip roofs shed rainwater water due to gravitational force. Flat roofs, alternatively, collect rain water. Unless this water is directed out and away from the roof , it will create pools of water that may eventually leak and the accumulated weight will subsequently cause compromising the integrity of the structure. That is the reason that roofs with a slope of less than two percent ought to have roof drains positioned at the lowest spots on the roof in which water pools and need to be uniformly spaced all throughout the roof top.

Roof Drain Kinds


There are several different alternatives of roof drains. They basically fall into two groups: flat roof drains and pitched roof drains. Pitched roof rainwater drains usually comprise gutters which collect rainwater that passes by means of gravity down to the roof periphery. Gutters direct this water in the direction of downspouts which steer the water flow down and away from the building or into sewer lines. Flat roof drains are one of three primary types: scuppers, inner drains or siphonic drains.

Roof Rainwater Drain Scuppes


Scuppers are located on a roof's periphery. They can also be put in on a balcony or terrace. Small holes are cut into the side of the roof structure so rain water can empty and drain the roof top. Scuppers can attach to a downspout, or can be lengthened to make sure that water is guided away from the structure sides and foundation.

Interior Roof Drains


There are quite a few different types of inner drains for flat roofs. These are positioned at low places in the roof and connect to inner drainage pipes that drive water outdoors or in to a sewer system. Several models of inner roof drains have domes, strainers or covers which prevent trash from clogging the roof drain pipe. These types of drains work via gravitational force channeling standing water thru the roof drain system. They can be made 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 permits both air and water to go into 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 body it creates a siphonic drain that removes air from the system and allows for smaller sized pipe diameters to be used. When all air is eliminated, a negative air pressure in the tail portion of the drain is set up which attracts water off the roof siphonically. Although used primarily 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 Jacksonville, Alabama, give us a call. We'd be glad to help.