MINERAL WOOL
Boxborough MA

Mineral wool insulation typically costs $1.00-$2.00 per square foot in Boxborough, positioned between fiberglass and spray foam in price. Most residential attic projects range from $2,000-$4,500. While more expensive than fiberglass, mineral wool offers superior fire protection (2,000°F), exceptional soundproofing (NRC 0.95), and 85% recycled content. With 30-40% energy savings and premium benefits, most homeowners find the investment worthwhile. We provide free, detailed estimates!

Mineral wool offers unique advantages: superior fire resistance (2,000°F vs 300-500°F for fiberglass), exceptional soundproofing (NRC 0.95 vs 0.50-0.75), won't sag or settle like fiberglass, and 85% recycled content. It's more fire-safe than spray foam and better for sound than both. While spray foam has higher R-value per inch and better air sealing, mineral wool provides the best balance of fire safety, sound control, sustainability, and value for Boxborough homes. We'll help you choose based on your priorities.

Yes! Mineral wool is one of the safest, most sustainable insulation options. Made from 85% recycled materials (natural stone and industrial slag), it's completely non-toxic, non-combustible, and contains no harmful chemicals or formaldehyde. Won't off-gas or emit VOCs. During installation, proper ventilation is recommended as with any insulation. Once installed, it's completely safe and actually improves indoor air quality by preventing moisture and mold. It's also resistant to pests and doesn't support bacterial growth.

Mineral wool provides exceptional soundproofing with an NRC rating of 0.95 (the highest for insulation materials). This means it absorbs 95% of sound that hits it. Perfect for bedrooms, home offices, home theaters, and reducing noise from neighbors or busy streets. The dense, porous structure absorbs sound waves at all frequencies. Many Boxborough homeowners choose mineral wool specifically for soundproofing between floors, in shared walls, or around noisy equipment like HVAC systems.

No! Mineral wool is naturally water-repellent and hydrophobic. Water runs off rather than being absorbed, and it dries quickly if exposed to moisture. Unlike organic materials like cellulose or even fiberglass, mineral wool's inorganic composition means it cannot support mold, mildew, or bacterial growth—there's simply no food source. It maintains its R-value even in humid conditions. This makes it ideal for Boxborough's climate with cold, humid winters and the perfect choice for basements and crawl spaces.

Mineral wool is made from natural stone heated to 3,000°F, so it withstands extreme temperatures up to 2,000°F without burning, melting, or releasing toxic smoke. It's classified as non-combustible and provides crucial fire protection—it can slow or prevent fire spread between rooms and floors. In house fires, mineral wool continues protecting while other insulation melts (spray foam at 300°F) or burns (cellulose). For Boxborough homeowners prioritizing family safety, mineral wool provides unmatched fire protection combined with excellent thermal and acoustic performance.