All our architectural laminate shingles are designed to protect against high winds seen in these conditions. Our TruDefinition ® Duration FLEX ® , TruDefinition ® Duration STORM ® , and TruDefinition ® WeatherGuard ® HP shingles also meet the industry’s highest classification for impact resistance, and they are preferred products in many hail- prone regions. With elevated storm activity, our entire shingle product line could see increased revenues. The roofing market is deeply affected by the unpredictability of storm activity, which accounts for less than 10% of Owens Corning’s revenue. External sources suggest that climate change will increase the frequency and/or severity of destructive storms, especially hurricanes. The Intergovernmental Panel on Climate Change (IPCC) projects “an 80% increase in the frequency of Saffir-Simpson category 4 and 5 Atlantic hurricanes over the next 80 years,” and the National Oceanic and Atmospheric Administration projects “tropical cyclone intensities globally will likely increase on average (by 1 to 10% according to model projections for a 2 degree Celsius global warming). This change would imply an even larger percentage increase in the destructive potential per storm, assuming no reduction in storm size.” Going by these sources, this range of values represents up to a 10% increase in storm activity in the long term. Opportunity: Increased Demand for Sustainable Products As the awareness of environmental deterioration increases, Owens Corning’s products become more important to consumers and to builders who market energy efficient structures. Our products, specifically insulation, are significant to the reduction of GHG from buildings. Because of this, Owens Corning stands to benefit from our reputation of promoting sustainability, as consumers concerned with climate change and the environment are likely to prefer Owens Corning products over those of our competitors. Recent examples of products which could see increased demand from climate-conscious customers include: 1. The products produced with a “Made with 100% Renewable Electricity and Reduced Embodied Carbon” Certification. We currently have 15 products that have received a third-party renewable electricity certification, up from 13 in 2020. These certified insulation products alert commercial architects, specifiers, builders, and homeowners to lower-carbon product options as they seek to build greener structures. They also help architects design buildings with reduced life cycle impacts, in keeping with the recognized goals of the Architecture 2030 Challenge and U.S. Green Building Council’s LEED ® certification. 2. Expanding our offering of “cool roof” shingles. Using a highly reflective granule technology that reflects the sun’s rays, Owens Corning’s Cool Roof Collection™ shingles help reduce energy use by keeping roofs cooler throughout the year and reducing air conditioning energy levels. Owens Corning offers a wide array of shingle choices that meet or exceed an aged SRI of 20 — the current aged Solar Reflectance Index minimum required for the Green Building Standards Code of Los Angeles County and Los Angeles City Cool Roofs Ordinance. In 2021, Owens Corning launched Duration ® COOL Plus Midnight color, providing a new dark color offering in this energy saving line. 3. Developing WindStrand ® , an innovative material that allows wind blade manufacturers to use 30% fewer layers of material in the molds for the blades while delivering the same quality and performance as standard fabrics. That, in turn, represents a 50% savings in labor and production time for the blades. In March 2021, we introduced WindStrand ® 4000, as well as Ultrablade ® 2 and Ultraspar™ 2, three high-performance materials that help wind blade manufacturers develop longer, stiffer, stronger blades and helps make wind energy more cost-effective. In 2021, Owens Corning introduced ArmaStrand™ Type 30 ® Single-End Roving product into the Russian market. This product is specifically designed to provide customers with productivity savings while increasing the service life of rebar. Using corrosion-resistant Advantex ® glass fiber, ArmaStrand™ has the flexibility to be used in a variety of rebar manufacturing processes and maximizes the mechanical properties of rebar systems with increased fiber content and higher bar modulus to meet new industry demands. 4. FOAMULAR ® NGX™ insulation. A new line of extruded polystyrene (XPS) foam products, FOAMULAR ® NGX™ is optimized to demonstrate a greater than 80% reduction in embodied carbon, compared to legacy FOAMULAR ® insulation products. 5. PAROC ® Natura Insulation. This line of stone wool insulation uses low-carbon melting technology, green electricity, recycled waste materials, and new technologies to reduce the amount of virgin raw material used and offer a product with very low CO 2 emissions. The remaining emissions are compensated by reducing CO 2 emissions through the purchase of offsets in a Verified Emissions Reduction Scheme. The new product line, which is certified as carbon-neutral by a third-party, offers fire-safe, durable insulation that does not decay when wet. PAROC ® Natura became available in Finland, Norway, and Sweden at the beginning of 2021. 2021 Owens Corning Sustainability Report | Appendices | 353 TCFD CLIMATE RISK & OPPORTUNITIES Appendix G