Because a properly designed, constructed and sound roof deck is
an important element of overall roof system performance, NRCA provides specific roof deck guidelines for
steep-slope roof systems. Some of NRCA's
recommendations go beyond code-mandated minimum requirements and
what sometimes is encountered in the field. As a result, you should
be aware of these differences in approach.
For wood plank and wood board roof decks, the terms "plank" and
"board" are differentiated by thickness and width.
Wood planks range in thickness from about 2 inches to 5 inches
and typically are installed with their wider dimensions in the
plane of a roof deck. Individual planks may have square, single or
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