[Pavers, Retaining Walls, Masonry Block - Superlite Block, a subsidiary of Oldcastle APG, a CRH company - Phoenix, AZ Superlite Block is a member of the nationwide network of Oldcastle APG, a CRH company, manufacturing facilities that produces Architectural Masonry and Concrete aggregate products. These products include concrete pavers and retaining walls, concrete block, stone veneers and brick veneers.]