Mineral wool (rock wool) batts such as Rockwool Comfortbatt and SafeSound are the superior fiber batt option for applications requiring fire resistance, acoustic performance, or moisture management. They outperform fiberglass batts in every performance category other than initial cost.
Smooth installs mineral wool batts throughout Boston-area new construction, multifamily renovations, and commercial buildouts. Mineral wool is our recommended batt product for party walls, floor assemblies between units, and any assembly where fire resistance is a code requirement.
The highest fire resistance of any batt insulation — does not melt, burn, or smoke
Denser fiber structure reduces sound transmission significantly compared to fiberglass
Will not absorb moisture or support mold growth
Maintains full cavity fill without compression or sagging
Self-supporting in standard framing — faster and cleaner installation
Fire rating and STC requirements confirmed before material selection.
Friction-fit into cavity without compression. Cut precisely around pipes and electrical.
Fire rating documentation provided for permit compliance.
Response within 2 hours. Mass Save® eligibility reviewed on every quote.
Get Free Estimate → 📞 857-214-2434Most MA homeowners qualify for 75–100% rebates on qualifying insulation and air sealing projects. We handle all paperwork.
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