SANCTUARY® Blow-In or Spray-Applied Insulation
SANCTUARY by Greenfiber® is the all-in-one cellulose insulation that can be blow-in, spray-applied, or dense-packed. It can be easily installed over existing insulation and unlike batt or roll alternatives, it’s engineered to fill every gap, void, and hard-to-reach space, forming a dense barrier that reduces air infiltration to boost thermal performance and reduce sound. Made with 85% recycled materials, free from harmful additives, SANCTUARY supports better living and a greener planet while meeting modern building codes and delivering lasting value for your home.
- Bag Size 25 lbs.
- R‑value per Inch 3.7
- Coverage 27.4 sq. ft. per bag at R-30
- Insulation Type Cellulose
Applications
- Walls
- Attics
- Floors
- Ceilings
Certifications
Product Features
-
60% Reduction in Sound Power1Best-in-class acoustic performance reduces unwanted sound to create a quieter and more peaceful home.
-
25% Savings on Heating and Cooling2Keeps indoor temperatures steady while reducing energy bills.
-
Class 1/A Advanced Fire ResistanceStops or slows the spreading of fires with permanent fire retardants that last the life of the home.3
Technical Information
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Access all the technical details, building code support and installation know-how you need to insulate with confidence — and meet today’s building standards with ease.
Data Chart
| Flammability Characteristics | |||
|---|---|---|---|
| Critical radiant flux | Smoldering Combustion | Flame Spread | Smoke Developed |
| Greater than or equal to 0.12 w/cm sq ft | Less than or equal to 15.0 percent | 5 | 5 |
| Environmental Characteristics | |
|---|---|
| Corrosiveness | Fungi resistance |
| Acceptable | Acceptable |
| Physical Characteristics | |||
|---|---|---|---|
| Density (settled) | Thermal resistance | Moisture Absorption | Odor emission |
| 1.5 pcf | 3.7 R/in. (at 4 in. thickness) | Acceptable | Acceptable |
| 25lbs (11.3kg) | |||||
|---|---|---|---|---|---|
R-Value at 75° Mean Temp. | Minimum Thickness (inches) | Net Coverage (adjusted for 2" x 6" framing on 16" centers) | |||
STABILIZED Initial Installed Thickness | LOOSE FILL Initial Installed Thickness | Settled Thickness | Maximum Sq. Ft. per Bag | Minimum Bags per 1,000 Sq. Ft. | |
| 13 | 3.8 | 3.9 | 3.6 | 72.6 | 13.8 |
| 19 | 5.5 | 5.7 | 5.3 | 48.8 | 20.5 |
| 22 | 6.4 | 6.6 | 6.1 | 41.2 | 24.2 |
| 30 | 8.7 | 8.9 | 8.3 | 27.4 | 36.5 |
| 38 | 10.9 | 11.2 | 10.4 | 19.9 | 50.1 |
| 44 | 12.6 | 12.9 | 12.0 | 16.5 | 60.8 |
| 49 | 13.9 | 14.3 | 13.3 | 14.6 | 68.5 |
| 60 | 16.9 | 17.3 | 16.1 | 12.0 | 83.5 |
| Dry Dense-Pack Sidewall & Floor Applications (3.5 pcf minimum installed density) | |||||
|---|---|---|---|---|---|
| Framing | Thermal Resistance (R-value) | Installed Thickness (inches) | Minimum Wt Per Square foot lb/ft2 | Maximum Coverage per Bag (Adjusted for Framing) | |
| 16 inch o.c.ft2/Bag | 24 inch o.c.ft2/Bag | ||||
| 2 x 4 | 13 | 3.5 | 1.02 | 27.0 | 26.1 |
| 2 x 6 | 21 | 5.5 | 1.60 | 17.2 | 16.6 |
| 2 x 8 | 28 | 7.5 | 2.19 | 12.6 | 12.1 |
| Spray Applied Sidewall Applications (2.75 pcf minimum installed density) | |||||
|---|---|---|---|---|---|
| Framing | Thermal Resistance (R-value) | Installed Thickness (inches) | Minimum Wt Per Square foot lb/ft2 | Maximum Coverage per Bag (Adjusted for Framing) | |
| 16 inch o.c.ft2/Bag | 24 inch o.c.ft2/Bag | ||||
| 2 x 4 | 13 | 3.5 | 0.79 | 35.0 | 33.8 |
| 2 x 6 | 21 | 5.5 | 1.24 | 22.3 | 21.6 |
SANCTUARY Insulation Fact Sheet
Fact Sheets & Coverage Charts
791.95 KB
| PDF
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SANCTUARY Insulation Attic Card
Fact Sheets & Coverage Charts
801.85 KB
| PDF
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Attic Floor Installation Guide for Contractors
Installation Guides
435.33 KB
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Attic Floor Installation Guide for DIY
Installation Guides
1.72 MB
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Wall Spray Installation Guide
Installation Guides
921.04 KB
| PDF
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Dry Dense-Packing Wall & Floor Installation Guide
Installation Guides
441.92 KB
| PDF
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SANCTUARY Safety Data Sheet
Safety Data Sheets
261.74 KB
| PDF
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Insulation Calculator
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Testimonials
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See how Greenfiber cellulose insulation is helping contractors, builders, architects and homeowners create quieter, more efficient and more sustainable spaces.
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