Mr. Ali Mahdavi reports

DOMAN BUILDING MATERIALS GROUP LTD. ANNOUNCES OFFERING AND PRICING OF REOPENING OF $170 MILLION SENIOR NOTES DUE 2029

Doman Building Materials Group Ltd. has entered into an underwriting agreement with a syndicate of underwriters consisting of Stifel, CIBC Capital Markets and TD Securities, as joint active bookrunners, and National Bank Capital Markets, Raymond James, RBC Capital Markets, Wells Fargo Securities, Canaccord Genuity and Desjardins Capital Markets, as joint bookrunners, to sell an additional $170-million aggregate principal amount of its 7.50 per cent senior unsecured notes due Sept. 17, 2029. The 2029 notes will be senior unsecured obligations of Doman, ranking equally with all other present and future senior unsecured indebtedness of the company. The notes will be issued at a price of 101.625 per cent of their face value (plus accrued interest from Sept. 17, 2025), with yield to call of 6.515 per cent and yield to maturity of 7.000 per cent. The notes will have identical terms and be fungible (following the expiry of the applicable statutory hold period) with and be part of a single series with the $365-million aggregate principal amount of 2029 notes currently outstanding.

The net proceeds from the issuance will be approximately $167-million. Doman intends to use the net proceeds, together with additional funds drawn under its syndicated credit facility, to repurchase for cancellation a portion of the outstanding senior unsecured subordinated notes issued by Doman due May 15, 2026 (the 2026 notes), and to redeem any 2026 notes that remain outstanding following the closing of the offering of 2029 notes.

The offering of 2029 notes is expected to close on or about Dec. 2, 2025, subject to customary closing conditions. The 2029 notes were offered on a private placement basis in each of the provinces of Canada pursuant to certain prospectus exemptions. The 2029 notes have not been registered under the U.S. Securities Act of 1933, as amended. and are being offered and sold into the United States only to qualified institutional buyers in reliance on Rule 144A of the U.S. Securities Act.

About Doman Building Materials Group Ltd.

Founded in 1989, Doman is headquartered in Vancouver, B.C., and trades on the Toronto Stock Exchange under the symbol DBM.

As Canada's only fully integrated national distributor in the building materials and related products sector, Doman operates several distinct divisions with multiple treating plants, planing, and specialty facilities and distribution centres coast to coast in all major cities across Canada and coast to coast across the United States.

Strategically located across Canada, Doman Building Materials Canada operates distribution centres coast to coast, and Doman Treated Wood Canada operates multiple treating plants near major cities. In the United States: headquartered in Dallas, Tex., Doman Lumber operates 21 treating plants, two specialty planing mills and five specialty sawmills located in nine states, distributing, producing and treating lumber, fencing and building material servicing the central United States; Doman Tucker Lumber operates three treating plants, specialty sawmilling operations and a captive trucking fleet serving the U.S. East Coast; Doman Building Materials USA and Doman Treated Wood USA serve the U.S. West Coast with multiple locations in California and Oregon; and in the state of Hawaii the Honsador Building Products Group services 15 locations across all the islands.

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