Start Time: 09:00 January 1, 0000 10:01 AM ET Owens Corning (NYSE:OC) Q4 2020 Earnings Conference Call February 17, 2021, 09:00 AM ET Company Participants Brian Chambers - Chairman and CEO Ken Parks - SVP and CFO Amber Wohlfarth - Director, IR Conference Call Participants Phil Ng - Jefferies Ashley Kim - Barclays Kathryn Thompson - Thompson Research Group John Lovallo - Bank of America Merrill Lynch Mike Dahl - RBC Capital Markets Michael Rehaut - JPMorgan Garik Shmois - Loop Capital Susan Maklari - Goldman ...

Brian Chambers | Chairman & Chief Executive Officer Ken Parks | Chief Financial Officer February 17, 2021 | Q4 & FY 2020 FOURTH-QUARTER AND FULL-YEAR 2020 RESULTS FORWARD-LOOKING STATEMENTS AND NON-GAAP MEASURES This presentation and the associated remarks contain forward-looking statements. We caution you against relying on these statements as they involve risks and uncertainties that are difficult to predict and the Company's actual results may differ materially from those projected. Such risks and uncert ...

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K ☑ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2020 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 1-33100 Owens Corning (Exact name of registrant as specified in its charter) Delaware 43-2109021 (State or other jurisdiction of incorporation or o ...

Owens Corning (NYSE:OC) Q3 2020 Earnings Conference Call October 28, 2020 9:00 AM ET Company Participants Amber Wohlfarth - Director, Investor Relations Brian Chambers - Chairman and Chief Executive Officer Ken Parks - Senior Vice President and Chief Financial Officer Conference Call Participants Matthew Bouley - Barclays Stephen Kim - Evercore ISI Truman Patterson - Wells Fargo Phil Ng - Jefferies Anthony Pettinari - Citi John Lovallo - Bank of America Susan Maklari - Goldman Sachs Michael Rehaut - JPMorga ...

Q3 2020 This presentation shared at the following events: FOCUSED ON SHAREHOLDER VALUE | --- | --- | --- | --- | |----------|-------------------------------------------------------|----------------------------------------|-------| | 09/15/20 | J.P. Morgan U.S. All Stars Conference | Scott Cripps \| VP, Investor Relations | | | 09/14/20 | RBC Capital Markets Global Industrials Conference | Scott Cripps \| VP, Investor Relations | | | 09/10/20 | OC (Virtual) Roadshow Hosted by Goldman Sachs | Marcio Sandri \| ...

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2020 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 1-33100 Owens Corning (Exact name of registrant as specified in its charter) Delaware 43-2109021 (State or ot ...

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2020 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 1-33100 Owens Corning (Exact name of registrant as specified in its charter) Delaware 43-2109021 (State or other j ...

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2020 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 1-33100 Owens Corning (Exact name of registrant as specified in its charter) Delaware 43-2109021 (State or other ...

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K ☑ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2019 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 1-33100 Owens Corning (Exact name of registrant as specified in its charter) Delaware 43-2109021 (State or other jurisdiction of incorporation or o ...

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q (Mark One) ☑ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2019 or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 1-33100 Owens Corning (State or other jurisdiction of incorporation or organization) (I.R.S. Employer Identif ...