Greenfiber · Insulation
Sanctuary® Blow-In or Spray-Applied Insulation
SANCTUARY by Greenfiber® is an all-in-one cellulose insulation that can be blown in, spray-applied or dense-packed. It fills gaps, voids and hard-to-reach spaces to form a dense barrier that reduces air infiltration and sound transmission.
Suitable for walls, attics, floors and ceilings, it can also be installed over existing insulation. Made with 85% recycled materials, SANCTUARY combines thermal performance, sound absorption and permanent fire retardants.
- Applications
- Walls, Attics, Floors, Ceilings
- Properties
- Recycled cellulose, Sound absorbing, Class 1/A fire resistance
- Insulation type
- Cellulose
- Bag size
- 25 lb (11.3 kg)
- R-value per inch
- 3.7
- Coverage
- 27.4 sq ft per bag at R-30
- Installation
- Blow-in, spray-applied or dense-packed
- Settled density
- 1.5 pcf (loose fill)
- Fire resistance
- Class 1/A
- Flame spread / smoke developed
- 5 / 5
Uses+
Attic loose-fill and stabilized applications.
Dry dense-pack wall and floor applications: minimum installed density 3.5 pcf.
Spray-applied sidewalls: minimum installed density 2.75 pcf.
Coverage and installed thickness depend on the assembly and target R-value; follow the manufacturer's fact sheet and installation instructions.
Sustainability Details+
Made with 85% recycled materials.
Greenfiber lists UL classification, Declare and Red List Free documentation on the product page.
