ROCKWOOL Comfortbatt R-21 Unfaced Mineral Wool Batt Insulation 5-1/2 in x 15-1/4 in x 47 in (39.82 sq-ft)
Regular price $48.45R-21 Unfaced Mineral Wool Batt Insulation
ROCKWOOL Comfortbatt is an unfaced stone wool batt designed for wood and steel stud cavities to improve thermal comfort and energy efficiency. Its flexible edge friction-fits for easier installation while helping maintain R-value, and it also provides fire resistance, moisture resistance, and sound absorbency.
Key Features:
- Flexible Edge Fit: Friction-fits into stud bays for easier installation and helps prevent over-compression to maintain R-value.
- Fire Resistant Stone Wool: Non-combustible insulation that won’t promote flame spread or develop toxic smoke when exposed to fire.
- Moisture Resistant: Helps resist water and moisture for more durable performance in wall and ceiling cavities.
- Sound Absorbing Comfort: Excellent sound absorbency to help reduce noise transfer between spaces.
- Health-Conscious Certification: GREENGUARD Gold Certified to support a healthier indoor environment.
Please check the Product Data Sheet Here
Specifications Table:
| Specification | Details |
|---|---|
| Brand | ROCKWOOL® |
| Product Line / Sub-brand | Comfortbatt |
| Category | Batt Insulation |
| Material | Mineral Wool (Stone Wool) |
| Facing Type | Unfaced |
| R-Value | R-21 |
| Thickness | 5-1/2 in |
| Width | 15-1/4 in |
| Length | 47 in |
| Coverage Area | 39.82 sq-ft |
| Installation Type | Ceiling |
| Application | Exterior wood and steel stud applications |
| Construction Type | Wood Stud Construction |
| Density | > 2 lb/cu-ft |
| Certification | GREENGUARD Gold Certified |
| Warning | California Proposition 65 warning (www.P65Warnings.ca.gov) |
Frequently Asked Questions (FAQ):
Q: Is this batt faced or unfaced?
A: It is unfaced mineral wool batt insulation.
Q: What size stud bays is it intended for?
A: The batt is 15-1/4 in wide and is intended for standard stud cavities of that width.
Q: What is the R-value and thickness?
A: It is R-21 and 5-1/2 in thick.
Q: Where can it be installed?
A: It’s listed for ceiling installation and is designed for exterior wood and steel stud applications.
Q: How much area does one package cover?
A: 39.82 sq-ft coverage per package.
Quiet, resilient comfort—built into the bones of the home
Great interiors feel effortless, and that starts with what you don’t see—layers that temper sound, heat, and the drama of daily living. Comfortbatt’s unfaced stone wool and flexible edge slip neatly into stud bays, creating a tailored envelope that holds its R-value without fuss. Use it to refine bedrooms, media rooms, and exterior walls where calm and consistency matter most. It’s a foundational luxury: performance, comfort, and peace—architected from within.
Upgrade your walls or ceilings with ROCKWOOL Comfortbatt for long-lasting R-21 comfort, sound control, and fire-resistant peace of mind.
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