Roof Drainage Terms

Siphonic drains typically cost more than other drain systems but they work smoothly and require relatively little maintenance.

Roof drainage terms.

It is also referred to as a drain basket drain cover or birdcage. They are often positioned towards the center of the roof or the place where the slope of the roof allows water to collect. It is also called a clamp collar clamp ring or flashing ring. Appropriate for large roofs inner drains help in draining the water away from the building.

Drain ring a metal ring placed around the drainpipe to secure the roof drain to a surface such as a roof deck or parapet wall. The drainage pipes are placed under the roof and in the walls of the building. Typical problems and design. Based on vertical drain leader diame ter roof slope roof area per drain and rainfall rate.

A roof s slope is the number of inches it rises for every 12 inches of horizontal run a roof with a 4 in 12 slope rises 4 inches for every 12 inches of horizontal run. An outlet or other device used to collect and direct the flow of runoff water from a roof area. A drip edge also can be used to break the continuity of contact between the roof perimeter and wall components to help prevent capillary action. The internal drain system usually features a.

The terms pitch and slope are simply two different ways of expressing the same measurement. A metal flashing or other overhanging component with an outward projecting lower edge intended to control the direction of dripping water and help protect underlying building components. Commonly used on flat commercial roofs siphonic drains allow for a minimal number of drains and all of the drains can be connected to a single leader.