2021 Owens Corning Sustainability Report | Our Approach | Stakeholder Engagement & Material Issues | 38 Supply Chain Sustainability We strive to hold our suppliers to the same high standards we hold ourselves. We see our suppliers as key contributors to our overall sustainability vision, and we seek to ensure all our suppliers fully comply with all applicable legislation, regulations, and legal requirements on human rights, labor, the environment, anticorruption, and trade and customs. Waste Management Our ambition is to mitigate the waste that we produce by redesigning the process to avoid its creation, then repurposing it whenever possible. We are committed to redefining waste, continuously looking for beneficial uses for our byproducts and other waste materials. Stakeholder Engagement Owens Corning interacts with a wide range of stakeholders on a regular basis. These stakeholders range from investors, customers, suppliers, community members, trade associations, and NGOs, to name a few. Through these engagements, we seek to accurately and transparently discuss our efforts, understand concerns, and work together for solutions. Customers Suppliers NGOs Governmental Agencies Employees Investors Trade and Industry Associations Media Communities Potential Employees Social media ✔ ✔ ✔ ✔ ✔ ✔ ✔ ✔ ✔ ✔ Website information ✔ ✔ ✔ ✔ ✔ ✔ ✔ ✔ ✔ ✔ Meetings and conference calls ✔ ✔ ✔ ✔ ✔ ✔ ✔ ✔ Conferences, speaking engagements ✔ ✔ ✔ ✔ ✔ ✔ ✔ ✔ ✔ Surveys, focus groups ✔ ✔ ✔ Visits and account management ✔ ✔ Education/ summits ✔ ✔ ✔ ✔ ✔ Internal communications ✔ Volunteer and community projects ✔ ✔ ✔ ✔ ✔ Memberships, sponsorship, board service, or project support ✔ ✔ ✔ 1-800-GETPINK and GETTECH@ owenscorning. com ✔ ✔ ✔ Our Material Topics represent our stakeholders’ priorities with consideration of our impacts, and they’re informed by the UN’s 2030 Sustainable Development Goals. This report is organized by these topics to show how our efforts, our goals, and our stakeholders’ priorities align.