Loose-Fill (Blown-In)
Blown-in Mineral Wool Insulation
Complete guide to blown-in mineral wool insulation: R-value, installed cost, pros, cons, and best applications.
Key Specifications
3–3.3
R-Value per Inch
$0.60–$1.00
Material Cost/sqft
$1.20–$1.80
Installed Cost/sqft
20"
Depth for R-60
Cost Analysis (1,200 sq ft Attic)
| Option | Low Estimate | High Estimate |
|---|---|---|
| Material only (DIY) | $720 | $1,200 |
| Professionally installed | $1,440 | $2,160 |
*Estimates for a full install to Climate Zone 5 R-60 depth. Use the calculator for your specific situation.
+ Pros
- ✓Excellent fire resistance — melts above 2,000°F
- ✓Superior soundproofing compared to fiberglass
- ✓Hydrophobic — repels water, resists mold
- ✓Dimensionally stable, does not settle
− Cons
- ✗Higher material cost than fiberglass or cellulose
- ✗Less commonly available at retail stores
- ✗Heavier product requires professional blowing equipment
Best Applications
- →Homeowners prioritizing fire safety
- →Noise reduction between floors
- →Humid climates where moisture resistance matters
- →Commercial or high-performance residential projects
Comparing Insulation Types
Blown-in Mineral Wool is a loose-fill (blown-in) insulation. With R-3–3.3 per inch, it is suited to applications where depth is not a constraint.
View full insulation type comparison →Explore Other Insulation Types
Is Blown-in Mineral Wool Right for Your Attic?
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