Owens Corning (OC) 10-K 2018 FY Annual report

Exhibit 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We hereby consent to the incorporation by reference in the Registration Statement on FormS-3 (No.333-222514) and Form S-8 (Nos. 333-210939, 333-188091, 333-166347, 333-150771, 333-150770, and 333-138392) of Owens Corning of our report dated February 20, 2019 relating to the financial statements, financial statement schedule and the effectiveness of internal control over financial reporting, which appears in this Form 10‑K.

/s/PricewaterhouseCoopers LLP

Toledo, Ohio

February 20, 2019