2021 Owens Corning Sustainability Report | Expanding Our Product Handprint | Sustainable Growth | 115 Owens Corning’s Sustainability Materiality Assessment emphasizes the importance of sustainable growth as part of our overall growth strategy and prosperity. The initiatives outlined here demonstrate the progress we’ve made to ensure that sustainability remains an integral part of our success. Owens Corning Inaugural Green Bond In 2019, Owens Corning issued its inaugural green bond, which was the first to be offered by an industrial company in the United States. The $450 million bond is payable over ten years at a coupon rate of 3.95%. In conjunction with the bond, the company committed to spending $445 million on eligible green projects. Green bonds represent a small but fast-growing segment of the overall bond market as investors increasingly value corporate sustainability and responsibility. A green bond is a fixed income debt instrument with characteristics similar to a traditional bond, but with a green bond, the issuer promises to use the proceeds to finance or refinance new or existing sustainable projects. The Green Bond Principles are voluntary guidelines established in 2014 and overseen by the International Capital Markets Association. Along with committing to use funds specifically for eligible projects, the issuer pledges to report on how it spends the allocated funds and the progress it makes on the initiatives outlined in connection with the bond. Owens Corning’s report on this inaugural green bond is available on the company’s website. Net Zero Energy-Ready Buildings Our products also play an important role in the development of net zero energy (NZE) buildings. An NZE building is one that produces the same amount of energy as it consumes. Buildings can be designed to be ultra- SUSTAINABLE GROWTH INITIATIVES efficient, making them NZE-ready. Then, when combined with the use of renewable energy, they can achieve net-zero energy status. While we have not set a specific target for NZE buildings as part of our 2030 goals, we work closely with organizations and contractors who are driving progress in this area. For example, we partner with Natural Resources Canada (NRCan) on several demonstration projects to help the building construction industry move toward net zero-ready performance, which will be mandated for all new buildings in 2030 as part of the Pan- Canadian Framework on Clean Growth and Climate Change. Owens Corning is in the midst of a two-year project with NRCan in Quebec to demonstrate and educate the building construction industry on building affordable net zero-ready homes in a large-scale setting. We are also working with NRCan on the prefabricated exterior energy retrofit (PEER) group project, which develops insulation systems and technologies for deep energy retrofits to get existing buildings in Canada up to net zero- ready performance. The Building Science Solution Center Owens Corning’s experts continually research and deploy building science to serve architects, buildings, occupants, and the environment. The Owens Corning Building Science Solution Center is a 24/7 portal connecting architects to emerging research, best practices, and thought leadership across a spectrum of building disciplines. In addition to delivering expertise related to sustainability, the Building Science Solution Center offers practical insights into the diverse challenges architects experience and provides access to certification documentation to meet green building program requirements. The portal’s resources include content drawing on more than 40 years of experience pioneering perimeter fire containment assemblies, as well as information designed to help architects predict moisture and thermal performance across a range of climates using WUFI ® analysis. Building science is promoted within the company through an internal team that engages industry partners, architects, engineers, and builders. Through lunch-and-learns, webinars, in-person and virtual seminars, workshops, and trade shows, our team helps drive the use of Owens Corning’s energy- saving products in more green building applications, maximizing their performance and helping them achieve green certifications such as LEED ® . Highly sustainable and energy-efficient solutions continue to be a focus for product and system innovation through collaboration. Cradle-to-grave evaluation of embodied carbon impact will now be at the center of that innovation. Our focus on successfully engaging high-impact architects, engineers, and construction customers around builders is crucial — it can have a ripple effect on sustainable revenue as they spread practices and specifications that bring awareness of Owens Corning ® products to a broader network. For example, if a major architectural firm begins to specify an Owens Corning ® insulation product, that approach may be shared with satellite locations as well, and the impact of the engagement will be magnified. Metrics tracking customers’ building science engagement include monitoring the number of people reached and events held. In 2021, Owens Corning held 267 building science engagement events and reached over 7,200 architects, engineers, and builders. As COVID-19 restrictions begin to be eased, we are hopeful that we can increase our numbers to pre-pandemic levels. Fuel cell buses used throughout the Olympic Village at this year’s games in Tokyo featured Owens Corning chopped strand mat in the air conditioner housings — one more way we’re supporting more sustainable transportation.