Guardian Building Products, Inc. (GBP), based in Greenville, South Carolina, is one of the largest building products distribution networks in the United States and through one of its subsidiaries, Guardian Fiberglass, Inc., manufactures a complete line of light density fiberglass insulation products for the residential and commercial construction markets in Canada and the United States. Guardian Fiberglass is the fourth largest producer of light density fiberglass insulation in North America.
As part of the multi-billion dollar Knauf family of companies, Knauf Insulation is a leading U.S. manufacturer of thermal and acoustical fiber glass insulations for residential, commercial, industrial, OEM and metal building applications.
Noble Company produces sheet membranes for waterproofing, crack isolation and sound insulation.
The Zinsser Brand manufactures and markets a comprehensive line of high-performance primers, wallcovering installation and removal products, interior wood finishes, exterior wood care products, concrete and masonry products, decorative finishes and products for the long-term prevention of mold and mildew.