Roof Drainage Terms

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.

Roof drainage terms.

Siphonic drains typically cost more than other drain systems but they work smoothly and require relatively little maintenance. Typical problems and design. The internal drain system usually features a. It is also called a clamp collar clamp ring or flashing ring.

The terms pitch and slope are simply two different ways of expressing the same measurement. It is also referred to as a drain basket drain cover or birdcage. Based on vertical drain leader diame ter roof slope roof area per drain and rainfall rate. 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.

Appropriate for large roofs inner drains help in draining the water away from the building. An outlet or other device used to collect and direct the flow of runoff water from a roof area. The same roof has a 4 12 or 1 3 pitch. 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.

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. They are often positioned towards the center of the roof or the place where the slope of the roof allows water to collect. 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.