Thermafiber UltraBatt R-15 Mineral Wool Insulation, 3.5" x 24" x 48"

Professional-grade mineral wool batts designed for superior thermal performance, fire resistance, and sound control in residential and light commercial walls. Semi-rigid, higher-density batts install quickly and resist moisture, corrosion, deterioration, and mold.

Key Features:

• Thermal Performance: R-15 mineral wool batts deliver reliable insulation for 2x4 wall cavities
• Fire Resistance: Non-combustible composition with robust fire performance for added safety
• Sound Control: Dense fiber structure helps reduce noise transfer between rooms
• Moisture & Mold Resistant: Inorganic fibers resist moisture, corrosion, and mold growth
• Easy Installation: Semi-rigid batts fit snugly in standard framing for faster, cleaner installs

Please check the Product Data Sheet Here

Specifications Table:

Frequently Asked Questions (FAQ):

Q: What framing does this fit?
A: The 3.5-inch thickness is designed for standard 2x4 wall cavities; each batt measures 24" x 48".

Q: Is this product combustible?
A: No, Thermafiber mineral wool is non-combustible and provides enhanced fire resistance.

Q: Can it be used in exterior walls?
A: Yes, it's suitable for exterior wall insulation in residential and light commercial applications.

Q: Does it resist mold and moisture?
A: Yes, the mineral wool fibers are resistant to moisture and mold growth.

Q: How many bags are included?
A: This listing specifies a pack of 16 bags.

Elevate Walls with Quiet, Fire-Safe Warmth

UltraBatt’s dense mineral wool brings a refined calm to interiors—quieting rooms while cocooning them in consistent warmth. Its non-combustible fibers and crisp, semi-rigid form speak to performance-driven design. Pair it with clean-lined drywall and matte finishes for an elevated, modern envelope. It’s a discreet essential that underpins luxurious, resilient living.

Choose UltraBatt R-15 today for safer, quieter, and energy-efficient walls that install with confidence.