Owens Corning and Masonite Extend Early Participation Deadline and Announce Successful Results of Early Participation in Tender Offer and Consent Solicitation

Owens Corning (NYSE: OC), a leader in global building and construction materials, and Masonite International Corporation (“Masonite”) (NYSE: DOOR), a leading global provider of interior and exterior doors and door systems, today announced that, in connection with the previously announced tender offer (the “Tender Offer”) by Owens Corning and consent solicitation (the “Consent Solicitation”) by Masonite, they have extended the early participation deadline with respect to the Tender Offer and Consent Solicitation from 5:00 p.m., New York City time, on April 26, 2024 to 5:00 p.m. New York City time, on May 13, 2024, which is the same time and date as the Expiration Time (as defined below) of the Tender Offer and Consent Solicitation.

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Owens Corning and Masonite are making the Tender Offer and Consent Solicitation pursuant to the terms of and subject to the conditions set forth in the offer to purchase and consent solicitation statement dated April 15, 2024 (the “Statement”), as amended by this news release. Except as set forth herein, all other terms and conditions of the Tender Offer and Consent Solicitation described in the Statement remain unchanged.

The deadline to withdraw Masonite Notes and revoke related consents tendered and delivered in the Tender Offer and Consent Solicitation was 5:00 p.m., New York City time, on April 26, 2024, which deadline has not been extended (the “Withdrawal Deadline”). Accordingly, previously tendered Masonite Notes and previously delivered consents may no longer be withdrawn or revoked, except where additional withdrawal rights are required by law. The Tender Offer and Consent Solicitation are scheduled to expire at 5:00 p.m., New York City time, on May 13, 2024, unless such date is extended or the Tender Offer and Consent Solicitation are earlier terminated (such date and time, as the same may be extended, the “Expiration Time”). Owens Corning and Masonite reserve the right to terminate, withdraw, extend or further amend the Tender Offer and Consent Solicitation as described in the Statement.