JM MinWool SAFB Mineral Wool Batt Insulation Unfaced R-3.7 24 in x 48 in x 6 in (48 sq ft)

Regular price $81.32

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Unfaced mineral wool sound & fire batt insulation

JM MinWool® Sound Attenuation Fire Batt (SAFB) is an unfaced mineral wool batt designed for sound control and fire resistance in wall, ceiling, and floor assemblies. Made from inorganic fibers derived from volcanic rock, it’s noncombustible and moisture-resistant, helping improve wall assembly STC ratings by up to 10 dB.


Key Features:

  • Sound Control: Absorbs sound and can improve wall assembly STC ratings by up to 10 dB
  • Fire Resistance: Noncombustible with melting point above 2000°F; Flame Spread 0 and Smoke Developed 0
  • Moisture & Mold Resistance: Moisture-resistant and inorganic—does not support fungi growth
  • Flexible Fit: Lightweight, flexible batts for metal-stud wall cavities and above suspended ceilings
  • Unfaced Batt Design: Ideal where an exposed facing isn’t desired or where separate vapor control is used

Please check the Product Data Sheet Here


Specifications Table:

Specification Details
Product Name R-3.7, 24 in x 48 in, Unfaced, Mineral Wool Batt Insulation, 48 sq-ft
Brand JM
Manufacturer Johns Manville
Material Mineral Wool (inorganic fibers derived from volcanic rock)
Facing Type Unfaced
R-Value R-3.7
Width 24 in
Length 48 in
Thickness 6 in
Coverage Area 48 sq-ft
Color Beige/Light Yellow/Tan
Installation Type Ceiling, Floor, Wall
Sound Control Absorbs sound and improves wall assembly STC ratings by up to 10 dB
Fire-Resistant Performance Melting point in excess of 2000°F (1093°C); Flame Spread 0; Smoke Developed 0
Resists Fire, Fungi, Moisture, Thermal, Vapor
Durability No growth of fungi; no sustaining of vermin

Frequently Asked Questions (FAQ):

Q: Where can this batt insulation be installed?
A: It’s listed for installation in ceilings, floors, and walls, including metal-stud interior partitions, exterior walls, and above suspended ceiling systems.


Q: Is this product faced or unfaced?
A: Unfaced.


Q: What R-value and size is each batt?
A: R-3.7; 24 in wide x 48 in long x 6 in thick.


Q: How much area does one unit cover?
A: 48 sq ft coverage area per unit.


Q: What does it resist?
A: Resists fire, fungi, moisture, thermal, and vapor exposure (per listing).


Quiet luxury, built into the walls

There’s a particular kind of indulgence that isn’t seen—it’s felt in the hush of a room and the confidence of materials that perform beautifully. JM MinWool® SAFB brings that sensibility to interiors with a refined, unfaced mineral-wool batt that elevates acoustic comfort while delivering serious fire resistance. Use it to transform media rooms, bedrooms, and shared walls into calm sanctuaries where sound softens and space feels more intentional. It’s the kind of behind-the-scenes essential that makes a home feel effortlessly luxurious.


Upgrade your walls and ceilings with JM MinWool SAFB for quieter rooms, confident fire resistance, and durable mineral wool performance.

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All orders are reviewed before fulfillment. You are not charged until your order is approved and ready to ship — and you may cancel at any time before that at no cost.

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