2021 Owens Corning Sustainability Report | Expanding Our Product Handprint | Product Innovation & Stewardship | 100 Owens Corning’s product stewardship program is a collaborative effort among many individuals, each of whom bring their own expertise across a range of subjects. The entire product stewardship organization provides counsel, guidance, and direction to ensure compliance with the Owens Corning product stewardship policy and Owens Corning standards. The product stewardship organization consists of the following: PRODUCT STEWARDSHIP ■ Chief Sustainability Officer (CSO) ■ Senior Director, Sustainability ■ Product Stewardship Leader y Manages the stewardship process. y Leverages the expertise of the product stewardship review board. ■ Product Stewardship Review Board y Global members with expertise in: • EHS. • Sustainability. • Chemistry. • Sourcing. • Product Compliance. • Reliability engineering. • Building Science. • Technical subjects. • Toxicology. • Analytical testing. y Carries out product reviews for all new and significantly modified products addressing all elements of our EHS and Product Stewardship Policy at one or more of these stages: • Design. • Manufacture. • Development. • Launch. • Test market. y Meets weekly to review new and significantly modified existing products. ■ Product Stewardship Advisory Council y Senior business and functional leaders who are responsible for linking product stewardship to the Owens Corning enterprise. y Meets throughout the year to provide insights into key EHS and performance issues, review product stewardship guidelines, discuss product stewardship review board activities, and communicate to the company.

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