Knight-Celotex is the leading manufacturer of insulation sheathing, sound deadening and roofing fiberboard for the residential and commercial construction industry. Knight-Celotex has the largest available selection of fiberboard products, serving manufacturers of bulletin boards, dry mark and magnetic boards, office partitions, laminated furniture and packaging. In addition to being nationally available, Knight-Celotex fiberboard products are earth-friendly, contributing toward the vast criteria set for green building. Knight-Celotex products are manufactured using recovered sugar cane or wood fibers using an environmentally friendly process.