Roof Drains


At this time there are a number of distinct kinds of roof water drains and cast iron roof drain in Opelika, AL and each one is a specific approach to the wide range of roof styles and their drainage concerns. You should think about the type of roof, its dimensions, and its roof pitch to be able to choose the most suitable drain. You also may want to take into account the site of the drain, how much rainwater is expected and safe practices when choosing a roof drain for a residence or business structure.

Gambrel, dormers, hip and gable roofs shed rainwater water thanks to gravity. Flat roofs, conversely, collect rain water. Until this water is guided out and away from the flat roof structure, it will most likely develop pools of water that may inevitably leak and the accumulated weight will subsequently result in compromising the integrity of the structure. That is why roofs with a pitch of under two percent ought to have roof drains positioned in the lowest spots on the roof in which water puddles and need to be evenly spread throughout the roof top.

Kinds of Roof Drains


There are a number of different alternatives of roof drains. They generally fall into two categories: pitched roof drains and flat roof drains. Pitched roof drains usually consist of gutters which collect rainwater which passes via gravity down to the roof periphery. Gutters transport this water in the direction of downspouts which steer the water flow down and away from the building or in to sewers. Flat roof drains are 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 holes are cut in the side of the roof structure so rain water can flow out and drain the roof surface. Scuppers can connect to a downspout, or can be lengthened to make sure that water is guided away from the building sides and foundation.

Inner Roof Drains


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

Siphonic Roof Drains

Siphonic roof drains are a more efficient alternative to gravity drainage. Traditional flat roof drainage permits both air and water to go into the drain system creating pipe space occupied by both air and water. By adding an engineered baffle to the sump of the drain body it produces a siphonic drain that eliminates air from the system and allows for smaller sized pipe diameters to be used. When all of the air is eliminated, a negative air pressure in the tail piece of the drain is established which attracts water off the roof siphonically. Although 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 cast iron roof drain in and around Opelika, Alabama, give us a call. We'd be glad to help.