Roof Drainage Terms

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.

Roof drainage terms.

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. Typically a low slope roof is designed with one primary roof drain and one secondary roof drain or overflow scupper drainage outlet at the perimeter of the building per structural bay. Typical problems and design. The drainage pipes are placed under the roof and in the walls of the building.

An outlet or other device used to collect and direct the flow of runoff water from a roof area. The terms pitch and slope are simply two different ways of expressing the same measurement. Based on vertical drain leader diame ter roof slope roof area per drain and rainfall rate. It is also referred to as a drain basket drain cover or birdcage.

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 siphonic roof drain utilizes siphoning as a drainage mechanism resulting in drainage that is faster than that on any other type of roof drain. Appropriate for large roofs inner drains help in draining the water away from the building. 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. The same roof has a 4 12 or 1 3 pitch. The internal drain system usually features a.