WEST FRASER TIMBER CO., LTD

This Annual Report and the exhibits attached hereto include certain statements that constitute "forward-looking statements" under the provisions of the U.S. Private Securities Litigation Reform Act of 1995, Section 21E under the Exchange Act, Section 27A of the U.S. Securities Act of 1933, as amended, and forward-looking information within the meaning of applicable Canadian securities legislation. Actual results or events could differ materially from those set forth in, or implied by, the forward-looking statements and the related assumptions due to a variety of factors. Investors are referred to the cautionary notes entitled “Forward-Looking Statements” that are included in each of our 2023 AIF and 2023 Annual MD&A for a discussion of these forward-looking statements and the risks that impact these forward-looking statements. Investors are also referred to the risks described under the title “Risks and Uncertainties” in our 2023 Annual MD&A and in our 2023 AIF. This list of important factors affecting forward-looking statements is not exhaustive, and reference should be made to the other factors discussed in public filings with securities regulatory authorities, including the SEC. Accordingly, investors should exercise caution in relying upon forward-looking statements, and West Fraser undertakes no obligation to publicly update or revise any forward-looking statements, whether written or oral, to reflect subsequent events or circumstances except as required by applicable securities laws.

NOTE TO UNITED STATES READERS REGARDING DIFFERENCES

BETWEEN UNITED STATES AND CANADIAN REPORTING PRACTICES

West Fraser is permitted to prepare this Annual Report in accordance with Canadian disclosure requirements which require Canadian public companies to prepare financial statements in accordance with International Financial Reporting Standards as issued by the International Accounting Standards Board ("IFRS Accounting Standards"). Accordingly, the Company’s 2023 Audited Annual Financial Statements have been prepared in accordance with IFRS Accounting Standards. Therefore, West Fraser’s 2023 Audited Annual Financial Statements incorporated by reference in this Annual Report may not be comparable to financial statements prepared in accordance with US GAAP. Our Independent Registered Public Accounting Firm performs an audit of the consolidated financial statements in accordance with the standards of the

Public Company Accounting Oversight Board (United States) (the "PCAOB"). Our Independent Registered Public Accounting Firm is independent within the meaning of the Chartered Professional Accountants of British Columbia Code of Professional Conduct in addition to the auditor independence standards of the PCAOB and the SEC.