James Hardie Gypsum - manufactures gypsum-based products for exterior and interior residential, commercial and industrial applications.

National Gypsum Company - manufacturer and supplier of Gold Bond brand gypsum wallboard and related products.

Titan Commercial Products - manufacturers of abuse, impact and moisture resistant fiber cement fire-rated wallboard, ceiling panels and soffits for commercial and high traffic area construction.

Unifix, Inc. - manufacturers of lightweight cement boards, flexible concrete board and cement tile backerboard.

USG Corporation

Westroc Industries Limited - manufacturer of drywall, finishing products, decorative mouldings, and pre-finished wall systems