GR Plume is certified by The American Plywood Association/Engineered Wood Systems (APA/EWS) for our gluing processes, as well as by the West Coast Lumber Inspection Bureau (WCLIB) for grading both green (fresh-sawn) and recycled lumber/timbers.

Other Affiliations:
Sustainable Connections
Building Industry Association of Washington
American Institute of Architects
Timber Framers Guild
Forest Products Society
Drug Free Business