Roof Drains


There are several different varieties of roof drains and roof drain strainer in Jasper, AL and each one is a specific solution to the wide range of roof types and their drainage issues. You should consider the type of roof, its dimensions, and the roof pitch to be able to choose the most suitable drain. You also need to take into consideration the site of the drain, how much rainwater is expected and safe practices when choosing a roof drain for a house or business building.

Gable, dormer, mansard and hip roofs shed water due to gravitational force. Flat roofs, alternatively, accumulate rain water. Unless the water is guided out and away from the roof , it will create pools that could eventually leak and the amassed weight will subsequently result in compromising the integrity of the structure. That is why roofs with a slope of below 2% should have roof drains positioned in the lowest areas on the roof in which water puddles and need to be uniformly spaced all throughout the roof surface.

Kinds of Roof Drains


There are several different variations of roof drains. They basically fall into two categories: pitched roof drains and flat roof drains. Pitched roof drains usually comprise gutters that collect rainwater that travels via gravity down to the roof periphery. Gutters transport this water in the direction of downspouts which route the water flow down and far 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 situated on a roof's periphery. They can also be put in on a balcony or terrace. Small openings are cut into the side of the roof structure so water can empty and drain the roof surface. Scuppers can hook up to a downspout, or can be extended to make sure that water is guided off of the structure sides and foundation.

Inner Roof Drains


There are quite a few different kinds of inner drains for flat roofs. These are positioned at low areas on the roof and attach to inner drainage pipes that drive water outside or in to a sewer system. Many designs of inner roof drains have domes, strainers or covers which keep trash from clogging the roof drain pipe. These types of drains operate via gravity funneling standing water through the roof drain system. They are made of PVC, cast iron or cast aluminum.

Siphonic Roof Drains

Siphonic roof drains are a more efficient substitute for gravity drainage. Conventional flat roof drainage permits 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 system it produces a siphonic drain that eliminates 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 established which draws rainwater off the roof siphonically. Although used primarily for flat roofs, siphonic drains can also be installed on angled roofs.

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