Roof Drainage System Definition

Usually scuppers are part of the backup drainage system that helps the roof shed excess stormwater.

Roof drainage system definition.

If a scupper is part of the overflow system then it will be a few inches typically two inches above the roof surface. Middle east plastic pipe market to see rapid growth to 2020. Inner roof drains are used on flat roofs and include a low section or channel that collects water and feeds it into a concealed drain that leads to an underground drainage system. In contrast a roof drain is a method of draining a roof assembly where the water runoff from the roof is transferred through the roof drain into piping that runs through the interior of the building before it empties either onto grade or into a storm sewer.

The most critical role of the drainage layer is to provide an adequate flow of water off the roof during and after rainfall. Siding leaks brick leaks stucco leaks stone leaks etc. From the very dawn of building construction it has been necessary to incorporate some method of gathering and discharging rainwater from the roof of a structure. The design of the different drainage layers allows for a portion of the stormwater to be retained above where the water is allowed to flow freely off of the roof.

A drain that is installed within the roofing systems of a structure. A scupper is a drainage point on the edge of the roof. All exterior claddings pass some rainwater. By contrast a siphonic roof drainage system contains an anti vortex plate that acts as a restrain and prevents air and debris from entering the piping system at full flow allowing the pipes to completely fill up with water.

They are incorporated into the walls or parapet. Roof drainage is one of the fundamental considerations of building design. Inner drains are resistant to freezing but can require careful maintenance to prevent problems. The main benefit of inner drains is that the system is hidden from view.

Controlling rain is the single most important factor in the design and construction of durable buildings and in the control of mold. Green roof solutions offers many different drainage layer options depending on system goals regarding water retention. If rainwater snow and ice accumulate the moisture can degrade and permeate the roofing assembly. While the various layers of the roof assembly play a key role in keeping moisture from infiltrating into the interior adequate weather protection also depends on the roof s ability to drain moisture away from the building.

Normally roof drains are required in flat or semi flat roofs and not in pitched roofs.