Batt / Roll
Mineral Wool Batts (Rockwool) Insulation
Complete guide to mineral wool batts (rockwool) insulation: R-value, installed cost, pros, cons, and best applications.
Key Specifications
3–4.2
R-Value per Inch
$0.60–$1.10
Material Cost/sqft
$1.20–$1.80
Installed Cost/sqft
17"
Depth for R-60
Cost Analysis (1,200 sq ft Attic)
| Option | Low Estimate | High Estimate |
|---|---|---|
| Material only (DIY) | $720 | $1,320 |
| 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
- ✓Highest fire resistance of any batt product
- ✓R-3.0 to R-4.2 per inch — denser than fiberglass
- ✓Naturally water-repellent
- ✓Better dimensional stability — stays in place
- ✓Healthier indoor air quality during installation
− Cons
- ✗Costs 2–3x more than fiberglass batts
- ✗Heavier to handle during installation
- ✗Fewer retail locations carry it
Best Applications
- →Homeowners willing to pay more for premium performance
- →Fire-prone areas (WUI zones)
- →Homes with moisture or mold concerns
- →Rental properties requiring low-maintenance solutions
Comparing Insulation Types
Mineral Wool Batts (Rockwool) is a batt / roll insulation. With R-3–4.2 per inch, it is suited to applications where depth is not a constraint.
View full insulation type comparison →Explore Other Insulation Types
Is Mineral Wool Batts (Rockwool) Right for Your Attic?
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