Guardian Fiberglass first started manufacturing fiberglass insulation products in 1980 and sales have grown annually since production began. As the manufacturing arm of Guardian Building Products, Guardian Fiberglass produces fiberglass insulation at strategically located facilities in North America:
- Albion, MI
- Mineral Wells, MS
- Inwood, WV
- Moses Lake, WA (under construction)
Each facility has a staff of technical, production, maintenance, shipping, supervisory, and human resources personnel, with administrative responsibilities handled primarily out of the Guardian Building Products Corporate Center in Greenville, SC.