Canadian Softwood Inspection Agency

Canadian Softwood Inspection Agency, Inc. (CSI) is an independent, CLSAB-accredited lumber grading agency and third-party inspection agency. CSI is a privately owned fee-for-service agency that provides quality inspection and certification services to the lumber manufacturing and wood preservation industries throughout Canada.

902 County Road 50 East
Harrow, Ontario N0R 1G0
Tel: 855-714-2090
Web: www.canadiansoftwood.com


The April 11, 1995 Accreditation Agreement with CSI recognizes them to supervise and grade stamp for each of the following classes of accreditation:

1. CLSAB has accredited CSI to supervise and grade stamp for each of the following classes of accreditation in accordance with CSA-O141 and ISO/IEC-17065:

    1. Visually Graded Lumber
      1. in accordance with CSA-O141 (May 23, 2023), CLSAB Regulations (October 23, 2024), the NLGA Standard Grading Rules for Canadian Lumber (2022) and CFLA JPS 1-05 (October 29, 2005)
    2. Agency Certified Lumber
      1. in accordance with CSA-O141 (May 23, 2023), CLSAB Regulations (October 23, 2024) and the NLGA Standard Grading Rules for Canadian Lumber (2022) and CFLA JPS 1-05 (October 29, 2005)
    3. Fingerjoined Lumber
      1. in accordance with NLGA Special Products Standard for Fingerjoined “Vertical Stud Use Only” Lumber (SPS 3 – March 2023)
    4. Machine-Graded Lumber (MSR/MEL)
      1. in accordance with NLGA Special Products Standard for Machine Graded Lumber (SPS 2 – February 2024)
  1. CLSAB has accredited CSI to supervise and mark for each of the following classes of accreditation in accordance with CSA-O141 and the CFIA-CLSAB Agreement:

    1. Canadian Heat Treated Wood Products Certification Program
      1. in accordance with the CFIA-CLSAB Agreement (October 31, 2014)
    2. Canadian Debarking and Grub Hole Control Program
      1. in accordance with the CFIA-CLSAB Agreement (October 31, 2014)
    3. Canadian Sawn Wood Certification Program
      1. in accordance with the CFIA-CLSAB Agreement (October 31, 2014)