Roof Drains


There are a number of different kinds of roof water drains and roof drain strainer in Florence, AL and each one is an unique approach to the variety of roof types and their drainage challenges. You must take into consideration the kind of roof, its dimensions, and its roof pitch to be able to choose the most suitable drain. You also need to take into account the site of the drain, what amount of rainwater is anticipated and safety when selecting a roof drain for a home or commercial building.

Gambrel, dormers, hip and gable roofs shed rainwater water thanks to gravity. Flat roofs, on the other hand, collect rain water. Unless this water is guided out and away from the roof , it will most likely develop pools that may eventually leak and the accumulated weight may eventually result in compromising the integrity of the structure. That is why roofs with a pitch of less than two percent ought to have roof drains positioned in the lowest spots on the roof where water puddles and need to be uniformly spaced throughout the roof top.

Types of Roof Drains


There are several different variations of roof drains. They basically fall into two categories: flat roof drains and pitched roof drains. Pitched roof drains normally consist of gutters which collect rainwater that travels via gravity to the roof periphery. Gutters transport this water in the direction of downspouts which direct the water flow down and far away from the building or in to sewer lines. Flat roof drains can be one of three main types: scuppers, inner drains or siphonic drains.

Roof Drain Scuppers


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 that rain water can empty and drain the roof surface. Scuppers can connect to a downspout, or can be lengthened so that water is directed off of the building sides and foundation.

Interior 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 outside or in to a sewer system. Several versions of inner roof drains have domes, strainers or covers that keep debris from blocking the roof drain pipe. These kinds of drains operate via gravitational force channeling standing water thru the roof drain system. They are made of 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 occupied by both air and water. By incorporating an engineered baffle to the sump of the drain body it produces a siphonic drain that removes air from the system and permits smaller sized pipe diameters . When all of the air is removed, a negative air pressure in the tail piece of the drain is set up which attracts 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 strainer in and around Florence, Alabama, give us a call. We'd be glad to help.