Greenfiber Share: Insulation Manufacturer Greenfiber Visit Website 5500 77 Center Drive Suite 100 Charlotte, NC 28217 (800) 228-0024 About Map About We are a cellulose insulation manufacturer based out of Charlotte, NC. The local Territory Sales Manager in Denver is looking to join the Denver HBA. What's Nearby? Distance: 5 10 15 20 25 50 mi.