JM MinWool SAFB mineral wool sound/fire batt (R-3.7)

JM (Johns Manville) MinWool Sound Attenuation Fire Batt (SAFB) is an unfaced mineral wool batt designed for noise control in wall and ceiling cavities. Its noncombustible and moisture-resistant, helping improve assembly sound performance while adding fire resistance.

Key Features:

Sound Dampening Performance: Absorbs sound and can improve wall assembly STC ratings by up to 10 dB.
Noncombustible Fire Resistance: Melting point exceeds 2000F with Flame Spread 0 and Smoke Developed 0.
Moisture & Mold Defense: Mineral wool resists moisture and does not support fungi growth.
Flexible Fit for Cavities: Lightweight batts sized for common stud bays and framing applications.
Unfaced Design: Installs without a facing for use in walls, floors, and ceilings where a vapor retarder isnt required.

Please check the Product Data Sheet Here

Specifications Table:

Specification	Details
Brand	JM (Johns Manville)
Product line	MinWool Sound Attenuation Fire Batt (SAFB)
Insulation type	Mineral wool batt insulation
Facing type	Unfaced
R-value	R-3.7
Thickness	2 in
Width	16 in
Length	48 in
Coverage area	74.66 sq-ft
Color	Beige/Light Yellow/Tan
Material	Mineral Wool (inorganic fibers derived from volcanic rock / inorganic fiber)
Installation locations	Ceiling, Floor, Wall
Designed applications (described)	Metal-stud wall cavities of interior partitions, exterior walls, or above suspended ceiling systems
Sound control (described)	Improves wall assembly STC ratings by up to 10 dB
Fire performance (described)	Melting point in excess of 2000F (1093C)
Flame spread (described)	0
Smoke developed (described)	0
Resists (listed)	Fire; Fungi; Moisture; Thermal; Vapor
Durability (described)	No growth of fungi; does not sustain vermin
ASTM C665	Type I
ASTM C518 (Thermal Resistance)	R-value at 75F; 3.7 per inch of thickness
ASTM E84	Flame Spread 0; Smoke Developed 0
ASTM E970 (Critical Radiant Flux)	> 0.12 W/cm (0.11 Btu/fts)
ASTM C1104 (Water Vapor Sorption)	< 1% by weight; < 0.2% by volume at 120F (49C), 95% RH
ASTM C1304 (Odor Emission)	Pass
ASTM C665 (Corrosiveness)	Pass
ASTM C1338 (Fungi Resistance)	Pass
ASTM E136 (Combustion Characteristics)	Pass

Frequently Asked Questions (FAQ):

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

Q: Is it fire resistant?
A: Yesit’s described as noncombustible with a melting point over 2000F, and has Flame Spread 0 and Smoke Developed 0.

Q: How much area does one bag cover?
A: This item covers 74.66 sq ft.

Q: What are the batt dimensions and R-value?
A: Each batt is 2 in thick, 16 in wide, 48 in long, with an R-value of R-3.7.

Q: Does it help with sound control?
A: Yesit’s described as improving wall assembly STC ratings by up to 10 dB.

Quiet Luxury, Built Into the Walls

Think of this mineral wool batt as the invisible layer of calm that makes a space feel curatedless echo, more intimacy. Its unfaced, sculptural simplicity disappears into cavities, yet it elevates the experience with serious sound absorption and formidable fire performance. Pair it behind crisp plaster, warm wood paneling, or tailored millwork to create rooms that feel hushed and intentional. Its the kind of behind-the-scenes essential that quietly defines luxurious living.

Upgrade your walls and ceilings with JM MinWool SAFB to add noticeable sound control and confidence-inspiring fire resistance.

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