Johns Manville MinWool SAFB Mineral Wool Batt Insulation R-3.7, 24 in. x 48 in. x 3 in., Unfaced (80 sq ft)
Regular price $81.32Unfaced mineral wool sound & fire batt insulation (24 in. x 48 in.)
Johns Manville MinWool® SAFB mineral wool batts are designed to improve sound control in wall and ceiling cavities while adding robust fire resistance. These unfaced 24 in. x 48 in. batts fit 24-in on-center framing and cover 80 sq ft per bag for fast, clean installation.
Key Features:
- Sound Control: Helps reduce noise transfer through interior partitions and wall/ceiling assemblies (improves STC ratings by up to 10 dB).
- Fire Resistance: Mineral wool with melting point in excess of 2000°F; flame spread 0 and smoke developed 0.
- Unfaced Design: No vapor retarder—ideal for interior partitions or adding to existing assemblies where a facer isn’t desired.
- Durable Inorganic Material: Resists fungi growth and does not sustain vermin.
- Easy Fit Batts: Pre-cut batts sized for 24-in on-center stud cavities and simple cutting/installation.
Please check the Product Data Sheet Here
Specifications Table:
| Specification | Details |
|---|---|
| Product Line | MinWool SAFB (Sound Attenuation Fire Batts) |
| Insulation Type | Batt insulation |
| Material | Mineral wool |
| R-Value | R-3.7 |
| Facing | Unfaced |
| Width | 24 in |
| Length | 48 in |
| Thickness | 3 in |
| Coverage Area | 80 sq ft per bag |
| Pieces per Package | 10 pieces per bag |
| Multi-Pack Quantity | 4 bags (multi-pack) |
| Sound Control | Absorbs sound; improves wall assembly STC ratings by up to 10 dB |
| Fire Resistance | Melting point in excess of 2000°F (1093°C); Flame Spread 0; Smoke Developed 0 |
| Durability | Inorganic—no growth of fungi; does not sustain vermin |
| Recommended Applications | Metal-stud wall cavities of interior partitions and exterior walls; above suspended ceiling systems |
| Framing Compatibility | For 2x4 steel-framed walls; 24-in on-center stud spacing |
| Vapor Retardant | No |
| Bag Dimensions (L x W x D) | 24 x 18 x 48 |
| Package Type | Multi-pack |
| Package Weight | 39.6 lb |
| Sound Barrier | Yes |
| ENERGY STAR Certified | Yes |
| Fits 2 x 4 Walls | Yes |
| Fits 2 x 6 Walls | No |
| CA Prop 65 Warning | Yes |
| Warranty | None |
| For Use in Walls | Yes |
| For Use in Ceilings | Yes |
| For Use in Floors | Yes |
| For Use in Crawlspaces | Yes |
| For Use in Attics | No |
| For Use in Basements | No |
| UNSPSC | 11162400 |
Frequently Asked Questions (FAQ):
Q: What framing is this insulation sized for?
A: It’s sized for 24-inch on-center cavities and is commonly specified for 2x4 steel-stud wall assemblies.
Q: Is it faced or unfaced, and do I need a vapor retarder?
A: It is unfaced (no built-in vapor retarder). Whether you need a separate vapor retarder depends on your wall assembly and local building code.
Q: Where can I use these batts?
A: They’re intended for sound attenuation and fire resistance in wall cavities and can also be used above suspended ceiling systems.
Q: How much area does one bag cover?
A: One bag covers 80 sq ft.
Q: What are the batt dimensions?
A: Each batt is 24 in. wide x 48 in. long x 3 in. thick.
Quiet luxury, built into the walls
There’s a certain kind of luxury you can’t see—only feel: the hush of a room that holds its calm. These unfaced mineral wool batts slip behind the surfaces to soften sound and add serious fire resistance, creating a sanctuary that performs as beautifully as it lives. Pair them with a layered wall finish—textural plaster, tailored millwork, or a gallery-ready paint sheen—for spaces that feel composed and quietly powerful. It’s the invisible upgrade that makes a home feel truly elevated.
Upgrade your walls and ceilings with Johns Manville MinWool SAFB batts to add quieter comfort and fire-resistant peace of mind.
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