Oldcastle® is the North American arm of CRH plc, a major international producer of construction materials and building products. Oldcastle companies operate on 900+ locations in 48 states and 4 Canadian provinces and have 30,000 employees. Oldcastle operates through two divisions: Oldcastle Materials Oldcastle Products and Distribution.
Thermafiber manufactures and customizes mineral wool insulation for commercial buildings, industrial applications and residential construction. Our products contain up to 90% recycled content, conserve energy, provide life saving fire protection and contribute to 33 LEED® credits across 4 categories.