X0306 4 2017-11-10 0 0001370946 Owens Corning OC 0001642415 Harter Ava ONE OWENS CORNING PARKWAY TOLEDO OH 43659 0 1 0 0 Sr. VP & General Counsel $.01 Par Value Common 2017-11-10 4 S 0 487 81.96 D 21050.887 D Phantom Stock 2017-11-10 4 I 0 86.899 81.89 D $.01 Par Value Common 86.899 0 D The price reported is a weighted average sale price. These shares were sold in multiple transactions at prices ranging from $81.96 - $82.01, inclusive. The Reporting Person undertakes to provide to Owens Corning, any security holder of Owens Corning, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote. Each share of phantom stock is the economic equivalent of one share of Issuer common stock. Phantom stock acquired through Issuer's Deferred Compensation Plan to be paid out upon Reporting Person's separation or upon the earlier of Reporting Person's separation or December 15, 2018, based on Reporting Person's election. /s/ Omar Chaudhary, Attorney-in-Fact 2017-11-14