Lumber Roof Terminology

End check separation of the wood fibers at the end of a board.

Lumber roof terminology.

Roof framing terms are related to the parts of a triangle. The terms pitch and slope are simply two different ways of expressing the same measurement. A metal closure set over or covering the joint between adjacent metal panels. End matched tongue and grooved on ends of boards as well as the sides as in oak flooring.

Even texture uniform texture showing little contrast between spring growth and summer growth. The same roof has a 4 12 or 1 3 pitch. 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. 2 in a metal roof.

1 cap or cover. A narrow plastic wood or metal bar which is used to fasten or hold the roof membrane and or base flashing in place. In the following section we ll cover some of the more common roof and rafter terms you ll need. Roof features associated with basic roof framing terms are shown in figure 2 2.

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. End grain lumber grain as seen from one end of the board. 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.