Lumber Roof Terminology

Roof features associated with basic roof framing terms are shown in figure 2 2.

Lumber roof terminology.

The terms pitch and slope are simply two different ways of expressing the same measurement. End check separation of the wood fibers at the end of a board. Even texture uniform texture showing little contrast between spring growth and summer growth. A metal closure set over or covering the joint between adjacent metal panels.

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. A narrow plastic wood or metal bar which is used to fasten or hold the roof membrane and or base flashing in place. 2 in a metal roof. In the following section we ll cover some of the more common roof and rafter terms you ll need.

4 in a membrane roof system. 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. 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. 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.

The same roof has a 4 12 or 1 3 pitch. 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.