MSL develops wood-fiber building materials for soundproofing, insulation, and wall or ceiling assemblies in residential and commercial construction. Based in Louiseville, Québec, MSL manufactures soundproofing panels, insulation boards, roofing insulation, and specialty fibreboard panels to improve acoustic performance, thermal insulation, and energy efficiency in buildings. MSL fibre panels are lightweight, durable, and made from natural, recyclable materials, making them a practical option for construction projects that require sound control and sustainable building materials.