Companies to Support Growing Wind Energy Demand Using Owens Corning’s Technology and CPIC’s New High-Modulus Glass Fiber Manufacturing Operation in China Owens Corning (NYSE: OC) announced today that it has entered into a Strategic Cooperation and Supply Agreement with Chongqing Polycomp International Corp. (CPIC) for joint investment in technology, and construction and operation by CPIC of a new facility dedicated to the manufacture of high-modulus glass fiber products in China. “This agreement positions two leading players in the wind industry to deliver the most advanced glass fiber technologies to serve growing industry demand for high-modulus glass,” said Marcio Sandri , President of Owens Corning’s Composites business. “The combination of innovative glass technology, enhanced quality and efficiency, and large-scale volumes will be beneficial to our respective customers. Wind energy is a key strategic market for Owens Corning representing a major platform for our growth in China ...

‘Purpose + People + Action’ reflects the footprint and handprint progress of 19,000 employees TOLEDO, Ohio – May 16, 2018 – Owens Corning (NYSE: OC) today published its 2017 Sustainability Report. The company’s 12th annual report, themed Purpose + People + Action, documents the progress made against its 2020 sustainability goals and its stated commitment to making the world a better place. The report also prominently features Owens Corning employee stories and employee images as a testament to their contributions. In the report, Chairman and CEO Mike Thaman and Chief Sustainability Officer Frank O’Brien-Bernini state: “We are pleased to share our 2017 Sustainability Report and our progress. We’ve built a company with three market-leading businesses, all delivering strong financial results. These results have been achieved using our decision framework for managing our company as a sustainable enterprise, a continued focus for us into the future.” The sustainable enterprise framework ...