Exhibit 21.1
| Subsidiaries of Owens Corning (12/31/2017) | State or Other Jurisdiction Under the Laws of Which Organized |
| 0979301 B.C. ULC | British Columbia |
| CDC Corporation | Wisconsin |
| Crown Mfg. Inc. | Ontario |
| Deutsche Foamglas GmbH | Germany |
| Dutch OC Coöperatief Invest U.A. | The Netherlands |
| Engineered Pipe Systems, Inc. | Delaware |
| Eric Company | Delaware |
| European Owens Corning Fiberglas SPRL | Belgium |
| Finefiber (Shanghai) Building Material Co. Ltd. | China |
| Finefiber Insulation Co. Pte. Ltd. | Singapore |
| Foamglas (Italia) SRL | Italy |
| Foamglas (Nordic) AB | Sweden |
| IBCO SRL | Barbados |
| Instalaciones Especializadas en Confort Termoacustico y Ampliacion, | |
| S. de R.L. de C.V. | Mexico |
| International Packaging Products Pvt. Ltd. | India |
| InterWrap (Hong Kong) Ltd. | Hong Kong |
| InterWrap (Qingdao) Trading Co., Ltd. | China |
| InterWrap Corp. | Oregon |
| InterWrap Corp. Pvt. Ltd. | India |
| Inversiones Owens Corning Chile Holdings Limitada | Chile |
| IP Owens Corning I, S. de R.L. de C.V. | Mexico |
| IPM Inc. | Delaware |
| OC Canada Finance Inc. | Canada |
| Owens Corning Canada Holdings ULC | British Columbia |
| OC Canada Holdings General Partnership | Delaware |
| OC Celfortec Company | Nova Scotia |
| OC Latin American Holdings GmbH | Austria |
| OC NL Invest Coöperatief U.A. | The Netherlands |
| OC PRO CV | The Netherlands |
| OCCV1, Inc. | Delaware |
| OCCV2, LLC | Delaware |
| OCV (Thailand) Co. Limited | Thailand |
| OCV Chambéry France | France |
| OCV Chambéry International | France |
| OCV Finance, LLC | Delaware |
| OCV Intellectual Capital, LLC | Delaware |
| OCV Italia Srl | Italy |
| OCV Mexico S. de R.L. de C.V. | Mexico |
| OCV Reinforcements Alcala Spain, S.L. | Spain |
| OCV Servicios Mexico, S.A. de C.V. | Mexico |
| OCV Steklovolokno OAO | Russia |
| Owens Corning (Australia) Pty Limited | Australia |
| Owens Corning (China) Investment Company Limited | China |
| Owens Corning (Guangzhou) Fiberglas Co., Ltd. | China |
| Owens Corning (Nanjing) Building Materials Co., Ltd. | China |
| Owens Corning (Shanghai) Fiberglas Co., Ltd. | China |
| Owens Corning (Singapore) Pte Ltd | Singapore |
| Owens Corning (Tianjin) Building Materials Co., Ltd. | China |
| Owens Corning (Xi’an) Building Materials Co., Ltd. | China |
| Owens Corning Alloy Canada GP Inc. | Canada |
| Owens Corning Alloy Canada LP | Manitoba |
| Owens Corning Argentina Sociedad de Responsabilidad Limitada | Argentina |
| Owens Corning Automotive, LLC | Delaware |
| Owens Corning BM (Korea), Ltd | Korea |
| Owens-Corning Britinvest Limited | United Kingdom |
| Owens Corning Canada GP Inc. | Canada |
| Owens Corning Canada Holdings B.V. | The Netherlands |
| Owens Corning Canada LP | Manitoba |
| Owens Corning Cayman (China) Holdings | Cayman Islands |
| Owens-Corning Cayman Limited | Cayman Islands |
| Owens Corning Celfortec Canada GP Inc. | Canada |
| Owens Corning Celfortec LP | Manitoba |
| Owens Corning Composite Materials Canada GP Inc. | Nova Scotia |
| Owens Corning Composite Materials Canada LP | Manitoba |
| Owens Corning Composite Materials, LLC | Delaware |
| Owens Corning Composites (Beijing) Co., Ltd. | China |
| Owens Corning Composites (China) Co., Ltd. | China |
| Owens Corning Construction Services, LLC | Delaware |
| Owens Corning DC Pension Plan Limited (In Liquidation) | United Kingdom |
| Owens Corning Elaminator Insulation Systems, LLC | Delaware |
| Owens Corning Enterprise (India) Pvt. Ltd. | India |
| Owens Corning Fabrics (Changzhou) Co., Ltd. | China |
| Owens Corning Fabwel, LLC | Delaware |
| Owens Corning Fiberglas (U.K.) Pension Plan Ltd. | United Kingdom |
| Owens Corning Fiberglas A.S. Limitada | Brazil |
| Owens-Corning Fiberglas Deutschland GmbH | Germany |
| Owens Corning Fiberglas Espana, SL | Spain |
| Owens Corning Fiberglas France | France |
| Owens Corning Financial Services ULC | Nova Scotia |
| Owens Corning Finland Oy | Finland |
| Owens Corning Foam Insulation, LLC | Delaware |
| Owens Corning Franchising, LLC | Delaware |
| Owens-Corning Funding Corporation | Delaware |
| Owens Corning GlassMetal Services (Suzhou) Co., Ltd. | China |
| Owens Corning Global Holdings LP | British Columbia |
| Owens Corning Holdings 1 CV | The Netherlands |
| Owens Corning Holdings 3 CV | The Netherlands |
| Owens Corning Holdings 4 CV | The Netherlands |
| Owens Corning Holdings 5 CV | The Netherlands |
| Owens Corning Holdings Holland B.V. | The Netherlands |
| Owens Corning HOMExperts, Inc. | Delaware |
| Owens Corning Hong Kong Limited | Hong Kong |
| Owens Corning HT, Inc. | Delaware |
| Owens-Corning (India) Private Limited | India |
| Owens Corning Industries (India) Private Limited | India |
| Owens Corning Infrastructure Solutions, LLC (created 05-25-17) | Delaware |
| Owens Corning Insulating Systems, LLC | Delaware |
| Owens Corning Insulating Systems Canada GP Inc. | Canada |
| Owens Corning Insulating Systems Canada LP | Manitoba |
| Owens Corning Intellectual Capital, LLC | Delaware |
| Owens Corning International Holdings C.V. | The Netherlands |
| Owens Corning InterWrap Canada GP Inc. | Ontario |
| Owens Corning InterWrap Canada LP | Manitoba |
| Owens Corning Japan, LLC | Japan |
| Owens Corning Kohold B.V. | The Netherlands |
| Owens Corning Korea | Korea |
| Owens Corning Mexico, S. de R.L. de C.V. | Mexico |
| Owens Corning Mineral Wool, LLC | Delaware |
| Owens Corning Non-Woven Technology, LLC | Delaware |
| Owens Corning Receivables LLC | Delaware |
| Owens Corning Reinforcements (Hangzhou) Co., Ltd. | China |
| Owens Corning Remodeling Canada GP Inc. | Canada |
| Owens Corning Remodeling Canada LP | Manitoba |
| Owens Corning Remodeling Systems, LLC | Delaware |
| Owens Corning Roofing and Asphalt, LLC | Delaware |
| Owens Corning Sales, LLC | Delaware |
| Owens Corning Science and Technology, LLC | Delaware |
| Owens Corning Sunrooms Franchising, LLC | Delaware |
| Owens Corning Supplementary Pension Plan Limited | United Kingdom |
| Owens Corning Technical Fabrics, LLC | Delaware |
| Owens Corning U.S. Holdings, LLC | Delaware |
| Owens-Corning Veil Netherlands B.V. | The Netherlands |
| Owens-Corning Veil U.K. Ltd. | United Kingdom |
| Pittsburgh Corning (United Kingdom) Limited | United Kingdom |
| Pittsburgh Corning (Yantai) Insulation Materials Co., Ltd | China |
| Pittsburgh Corning Asia Limited | Hong Kong |
| Pittsburgh Corning Corporation | Pittsburgh |
| Pittsburgh Corning CR, S.R.O. | Czech Republic |
| Pittsburgh Corning Europe N.V. | Belgium |
| Pittsburgh Corning France | France |
| Pittsburgh Corning Gesellschaft m.b.h. | Austria |
| Pittsburgh Corning Nederland B.V. | The Netherlands |
| Pittsburgh Corning Singapore Pte., Ltd | Singapore |
| Pittsburgh Corning Suisse SA | Switzerland |
| Qingdao Novia Polymer Co., Ltd. | China |
| Soltech, Inc. | Kentucky |
| Tecnologia Owens Corning I, S. de R.L. de C.V. | Mexico |
| TF Holding Corp. | Delaware |
| Thermafiber, Inc. | Delaware |
| Transandina de Comercio S.A. | Chile |