2021 Owens Corning Sustainability Report | Overview | Message from our CEO and CSO | 4 A MESSAGE FROM OUR CEO AND CSO The foundation for our sustainability aspirations and our growth strategy is our mission — to build a sustainable future through material innovation. In 2021, our people thrived while persevering through continuing challenges and crises around the world that are changing social, political, and economic landscapes everywhere. We are extremely proud of our global Owens Corning team for their resolve and resiliency, which has enabled enduring sustainability progress in another demanding year. As we communicate each year, our aspiration is to be a net-positive company. In the pages of this document, our 16th annual sustainability reports, it’s our privilege to provide some highlights of our goals and approach, the progress we’ve made to date, and our work ahead. This 2021 report covers our efforts to double our products’ handprint and halve our environmental footprint, while concurrently working to eliminate injuries and lifestyle-induced diseases, advance inclusion and diversity, and collaborate to make a positive difference in the communities where we work and live. We began our sustainability journey nearly two decades ago, and along the way our goals have evolved, guided by the best available science. With the latest report from the Intergovernmental Panel on Climate Change affirming the need for urgent action, our science-based targets continue to inform our strategies and tactics from today to next week, next month, next year, and to 2030 and beyond. Like many companies around the world, Owens Corning faced headwinds in 2021. The continuing pandemic, supply chain disruption, inflation, and other headline-gr abbing events and influences all required innovation and adaptability for our business to succeed. At the same time, many of our manufacturing facilities were running at full capacity to continue to serve our customers. In 2021, as in any business environment, our 2030 sustainability goals helped us stay focused on the future while we navigated the present. We have established roadmaps to help our teams understand what’s needed to meet our environmental footprint reduction goals. These roadmaps guide our short-, mid-, and long-term strategies, and help ensure that sustainability remains our priority as we innovate to serve our customers while addressing both the challenges and the opportunities within the relevant secular trends. Among the trends that affect our markets, we see growth opportunities for Owens Corning in the increased premium of living spaces; changing construction practices due to labor shortages; demand for sustainable solutions for decarbonization and circularity; and investment in durable infrastructure. In fact, approximately 60% of our revenue comes from our portfolio of products that save energy or reduce emissions. These products have a role in energy efficiency improvements, housing renovation and construction, and increased renewable energy penetration — so the more we reduce our environmental footprint, the faster we achieve our net-positive aspiration. This dynamic drives our 2030 goal to cut our GHG emissions in half; this target has been verified by the Science Based Target initiative to be in line with the Intergovernmental Panel on Climate Change’s pathway to limit global warming to 1.5° Celsius maximum above pre-industrial levels. Concurrently, we have a science-based target of 30% reduction across our Scope 3 emissions that is also verified by SBTi. Photo submitted by: Kristin Bell | Toledo, Ohio, U.S. Rocky Mountain State Park, Colorado, U.S.