How important is the grade of the timber?
Very important. Depending on the species, the grade and specification can be critical. For example, Woodhouse® uses Douglas fir that is only dense growth, free-of-heart center (FOHC), number one or better, and with no bark or wane. The reasons are significant: FOHC Doug fir checks less; dense growth means less checking and twisting; number one or better provides straighter grain and fewer knots resulting in a better appearance; no bark or wane also improves the appearance. Different species of wood have different specifications. For example our red oak timbers are boxed heart to minimize checking. The grade of our red oak is also superior to any and every other oak frame. Every species reacts differently and each requires unique specifications to optimize its distinct characteristics for use as a timber frame.
