Lumber Roof Terminology

In the following section we ll cover some of the more common roof and rafter terms you ll need.

Lumber roof terminology.

4 in a membrane roof system. A strip of wood usually set in or over the structural deck used to elevate and or attach a primary roof covering such as tile. 2 in a metal roof. The terms pitch and slope are simply two different ways of expressing the same measurement.

A prefabricated solid engineered wood panel made from at least three layers of solid sawn lumber or structural composite lumber scl that are stacked crosswise and bonded together with structural adhesives to form a solid rectangular shaped panel that is intended for construction applications including roofs floors and walls in residential and nonresidential buildings. The rigid material often 1 inch by 6 inch or one inch by twelve inch boards or sheets of plywood which is nailed to the rafters and to which shingles or other outside roofing materials are secured. Roof framing terms are related to the parts of a triangle. 1 cap or cover.

End check separation of the wood fibers at the end of a board. End matched tongue and grooved on ends of boards as well as the sides as in oak flooring. Framing terms knowing the basic vocabulary is a necessary part of your work as a builder. The same roof has a 4 12 or 1 3 pitch.

Roof features associated with basic roof framing terms are shown in figure 2 2. Even texture uniform texture showing little contrast between spring growth and summer growth. End grain lumber grain as seen from one end of the board.