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.

• See also:
• Masterformat 2004
• 06 16 43 - Gypsum Sheathing
• 07 00 00 - THERMAL AND MOISTURE PROTECTION
• 07 20 00 - THERMAL PROTECTION
• 07 21 00 - Thermal Insulation
• 07 26 00 - Vapor Retarders
• 07 31 00 - Shingles and Shakes
• 07 31 13 - Asphalt Shingles
• 07 46 00 - Siding
• 07 60 00 - FLASHING AND SHEET METAL
• 07 92 19 - Acoustical Joint Sealants
• 08 50 00 - WINDOWS
• 08 83 00 - Mirrors
• 09 81 00 - Acoustic Insulation
• 10 28 19 - Tub and Shower Doors
• Masterformat 1995
• 07200 - Thermal Protection
• 07210 - Building Insulation
• 07260 - Vapor Retarders
• 07300 - Shingles and Roofing Tiles
• 07460 - Siding
• 09200 - Plaster & Gypsum Board
• 09820 - Acoustical Insulation and Sealants