2021 Owens Corning Sustainability Report | Expanding Our Product Handprint | Circular Economy | 89 Shingle Recycling Each year, over 13 million U.S. tons of shingle waste is generated. Less than 10% of that is manufacturing waste, and the remaining balance consists of shingles removed at the end of their life, after decades of use protecting homes. Over the years, Owens Corning has attempted to solve this problem with varied approaches. By volume, the most impactful use of shingle waste has historically been to process for reuse into asphalt paving. The Specialty Asphalt paving business has leveraged the Owens Corning contractor network and our unique position in the roofing and paving industry to develop opportunities for recycling post-industrial and post-consumer Recycled Asphalt Shingles (RAS). At its peak in 2015, two million U.S. tons of RAS were used in paving, and although that amount has dropped considerably, we are confident that with the right technical expertise, processes, and products, it can be an important contribution to the shingle circular economy. Owens Corning worked with companies in Oklahoma City, Oklahoma, U.S., to reuse byproducts from manufacturing and post-consumer shingle waste in paving applications. Using balance mixed design (BMD) techniques, the asphalt mixtures contained up to 5% recycled asphalt shingles and 20% reclaimed asphalt pavement. Through this program, the team diverted 18,000 U.S. tons of shingle waste from landfills in 2021. Additionally, Owens Corning is continuing to innovate with technology and contractor partners on further developing and refining mix designs which will build confidence among departments of transportation and the paving industry to increase the use of RAS in paving, unlocking potential for significant diversion waste shingles from landfills in the future. In addition to diverting shingles to paving applications, by deconstructing the component parts of the shingle — its granules, glass, sand, and filler — we are pursuing the capability to extract the value from those components. Owens Corning is working with a range of companies, from large corporations to small entrepreneurial innovators in adjacent industries, to develop efficient, effective, and practical ways to bring end-of-life shingle waste into the circular economy. In conjunction with these efforts, our Roofing business is promoting recycling among roofing contractors. We have created a campaign designed to highlight the benefits of recycling. This includes increased demand for sustainable products, especially as younger generations enter into homeownership, as well as limits on building waste in landfills, which are imminent. To support contractors in this campaign, we have developed a range of marketing materials, including flyers, yard signs, door hangers, and more, which they can use to differentiate themselves from the competition and to help build their brand as a company that cares about sustainability. While our ability to fully implement this campaign remains contingent on the availability of shingle recycling sites near the contractor, we are confident that this engagement of contractors can be an important component of our shingle recycling initiatives in the future. We are also working with the markets into which these products would go, from roofing solutions to industrial asphalt and the specialty paving industry. The use of reclaimed asphalt pavements (RAP) is one of the largest circular economies in the U.S., representing over 85 million tons each year. Our Specialty Paving business participates in this through the development of unique binders that allow for increased use of RAP in asphalt pavement. In addition, we are addressing waste through our work with industry organizations and regulatory agencies. Owens Corning has a leadership role with Asphalt Roofing Manufacturers Association (ARMA) with respect to the Asphalt Roofing Recycling Committee and the Asphalt Institute Foundation (AIF) research area. We recently helped sponsor and participated in ARMA’s shingle recycling forum, which was a virtual national event focused on recycling. We also are working directly with agencies such as CalRecycle, an organization within the California EPA, to share best practices and collaborate on programs which promote the development of sustainable practices at the intersection of industry and state policy. 3D Printing One way we are using technology to implement the circular economy model is through 3D printing, including metal 3D printing. We have found it to be a valuable resource in our development of prototypes, and we are actively working to expand our capacities in that area. In 2021, we installed a new 3D metal printer in our prototyping lab in Granville, Ohio, U.S. In addition, our partnership with The Ohio State University has enabled us to 3D print a critical part in our manufacturing process. The implementation of 3D printing offers us several advantages in reducing waste generation, which is aligned with our circular economy goals, as materials can be recycled back into powder. This creates a closed cycle with very little waste. In addition, when parts can be printed on demand, we can potentially have fewer parts on hand as inventory. Owens Corning is working to develop innovations that will increase the use of recycled asphalt shingles in paving — and divert more shingle waste from landfills. ” “