OSB Norbord Inc

NORBORD INC. STOCK OPTION PLAN

(Full title of the plan)

TORYS LLP

1114 AVENUE OF THE AMERICAS, 23RD FLOOR

NEW YORK, NY 10036

ATTENTION: ANDREW J. BECK

(212) 880-6010

(Name, address and telephone number, including area code, of agent for service)

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company.

DEREGISTRATION OF SECURITIES

These post-effective amendments relate to the following registration statements on Form S-8 (collectively, the “Registration Statements”) filed by Norbord Inc. (“Norbord”) with the Securities and Exchange Commission:

On February 1, 2021, pursuant to an Arrangement Agreement, dated November 18, 2020, between Norbord and West Fraser Timber Co. Ltd. (“West Fraser”), West Fraser has acquired all of the issued and outstanding shares of Norbord (the “Arrangement”).

As a result of the completion of the Arrangement, Norbord has terminated all offerings of securities pursuant to the Registration Statements. In accordance with an undertaking made by Norbord in the Registration Statements to remove from registration, by means of a post-effective amendment, any of the securities that had been registered for issuance that remain unsold at the termination of such offering, Norbord hereby removes from registration all of such securities registered but unsold under the Registration Statements as of the date hereof, if any.