Roof Drains

There are a number of different kinds of roof water drains and roof drain strainer in Attalla, AL and each is a specific approach to the variety of roof types and their drainage issues. You should look at the kind of roof, its size, and its roof pitch to be able to choose the correct drain. You also need to take into account the location of the drain, how much rainwater is expected and safe practices when choosing a roof drain for a house or commercial building.

Gable, dormer, mansard and hip roofs shed rainwater water thanks to gravitational force. Flat roofs, conversely, collect rain water. Unless this water is guided out and away from the flat roof , it will most likely develop pools of water that may inevitably leak and the accumulated weight may subsequently result in structural damage. That is why roofs with a slope of under 2% should have roof drains positioned at the lowest areas on the roof in which water puddles and should be evenly spread throughout the roof surface.

Roof Drain Types

There are a number of distinct 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 accumulate rainwater which passes via gravity to the roof edge. Gutters transport 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 primary types: scuppers, inner drains or siphonic drains.

Roof Drain Scuppers

Scuppers are situated on the 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 water can empty and drain the roof top. Scuppers can attach to a downspout, or can be extended to make sure that water is guided away from the building sides and foundation.

Inner Roof Drains

There are many types of inner drains for flat roofs. These are installed at low areas on 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 which prevent trash from clogging the roof drain pipe. These types of drains work via gravity funneling standing water thru the roof drain system. They can be made of PVC, cast iron or cast aluminum.

Siphonic Roof Drains

Siphonic roof drains are a more efficient substitute for gravity drainage. Traditional flat roof drainage permits both air and water to go into 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 body it creates a siphonic drain that removes air from the system and allows for smaller pipe diameters to be used. When all air is removed, a negative air pressure in the tail portion of the drain is established which attracts water off the roof siphonically. Although used primarily for flat roofs, siphonic drains can also be installed on pitched roofs.

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