Ontario-based Nudura Corporation, a manufacturer and distributor of insulated concrete forms (ICF) in North America, has been brought by Dryvit Systems, a manufacturer of exterior insulation and finish systems (EIFS).

CertainTeed Corporation has bought Hunter Douglas’ North American ceilings operations. Hunter Douglas’ North American business manufactures architectural ceilings and soffit systems with operations in Norcross, Georgia, and Denver, Colorado, and has 100 employees.