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Exhibit 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We hereby consent to the incorporation by reference in the Registration Statements on Form S-3 (No. 333-279742) and Form S-8 (Nos. 333-279408, 333-271452, 333-237890 and 333-231002) of Owens Corning of our report dated February 25, 2026 relating to the financial statements and the effectiveness of internal control over financial reporting, which appears in this Form 10-K.

/s/PricewaterhouseCoopers LLP

Toledo, Ohio

February 25, 2026