As the body overseeing performance of the Canadian lumber grading system, CLSAB has four main roles:

• establish policy for and control the identification, assessment, grading, and stamping or certification of lumber in Canada
• accredit and supervise lumber grading agencies, including performance audits at mills and treatment facilities
• review and approve grading rules and other standards used in the accreditation of agencies, and in the certification of lumber manufacturers
• help explain Canada’s lumber grading system here and around the world

CLSAB’s work is recognized and relied upon by government and standards authorities/regulators, nationally and internationally.

It is the only body formally recognized by the Canadian Standards Association as the accrediting body for lumber grading and inspection agencies. The relevant CSA standard is used in the model National Building Code of Canada and all Provincial Building Codes.

In addition, the Canadian Food Inspection Agency formally recognizes CLSAB as the organization that oversees and delivers its Canadian Heat Treated Wood Products Certification Program. CLSAB's accredited Agencies are recognized as Service Providers under this program.