Lumber grading Rules

Lumber inspection and grade rules writing. WWPA is one of seven grading agencies in North America authorized to write and publish grading rules for lumber. The Association also conducts regular inspections at mills to assure consistent quality between mills. Each year, WWPA lumber inspectors check lumber representing some 10 billion board feet of production.

Western Red Cedar Decking

Western Red Cedar (WRC) decking substantially outperformed composite decking in each of the seven criteria tested and was by far the product with the least environmental impact when compared with both virgin and recycled wood-plastic composite decking products.  Even after subjecting the cedar decking results to a ‘worst case’ scenario in which WRC required the replacement of 20% of boards in normal service and periodic application of coatings, the environmental impact results remained strongly favorable to Western Red Cedar over the ‘best case’ scenario for composite decking.

Western Red Cedar Lap Siding

Channel siding is a popular type of lap  siding and is used whenever a rustic appearance  is desired. A  versatile siding, it can be installed vertically, horizontally or diagonally.  In channel siding the profile of each board  partially overlaps that of the board next to it creating a channel that gives shadow line effects, provides excellent weather protection and allows for dimensional movement.