Johns Manville R-13 FSK-25 Faced Fiberglass Batt Insulation – 16 in x 96 in (117.33 sq ft)
Regular price $99.42R-13 FSK faced fiberglass batt insulation
Johns Manville R-13 FSK-25 faced fiberglass batts deliver dependable thermal and sound performance for framed wall, floor, and ceiling cavities. The foil-scrim-kraft facing adds vapor resistance and can be left exposed where building codes permit.
Key Features:
- FSK-25 Vapor-Retarder Facing: Foil facing provides excellent vapor resistance and may be left exposed where codes permit.
- Precut for Standard Cavities: Sized for 16 in on-center framing and 8-ft wall heights to speed installation.
- Thermal + Acoustic Performance: Helps reduce heat transfer while also reducing sound transmission through assemblies.
- Fire-Resistant Facing: Rated for Flame Spread 25 or less and Smoke Developed 50 or less (per listed product data).
- Indoor Air Quality Focus: Formaldehyde-free and listed with GREENGUARD Gold/SCS indoor air quality certifications (per listed product data).
Please check the Product Data Sheet Here
Specifications Table:
| Specification | Details |
|---|---|
| Brand | Johns Manville (JM) |
| R-Value | R-13 |
| Insulation Type | Batt insulation |
| Material | Fiberglass |
| Facing | FSK-25 faced (foil-scrim-kraft) |
| Batt Width | 16 in |
| Batt Length | 96 in (8 ft) |
| Thickness | 3 1/2 in |
| Coverage | 117.33 sq ft per bag |
| Formaldehyde-Free | Yes |
| Fire Rating (Facing) | Flame Spread 25 or less; Smoke Developed 50 or less |
| Sound Control | Reduces sound transmission through wall, floor, and ceiling assemblies |
| Vapor Retarder | FSK-25 facing serves as a vapor retarder; may be left exposed where codes permit |
| Fit/Framing | Precut batts to fit standard wall cavities; designed for standard 8-ft walls with 16-in on-center stud spacing |
| Certifications/Programs | SCS Recycled Content certification; GREENGUARD Gold Certified (office indoor air quality); SCS Certified (home indoor air quality); ENERGY STAR Seal and Insulate partner |
| Master Pack Quantity | 5 per master pack |
Frequently Asked Questions (FAQ):
Q: What framing size does a 16 in x 96 in batt fit?
A: It’s precut for 16 in on-center stud/joist cavities and 8-ft spans (96 in length).
Q: Can the foil (FSK) facing be left exposed?
A: The FSK-25 facing may be left exposed where local building codes permit, and it also functions as a vapor retarder.
Q: What is the coverage per bag?
A: This package covers 117.33 sq ft per bag.
Q: Is this insulation formaldehyde-free?
A: Yes—this Johns Manville product is listed as formaldehyde-free in the provided web product data.
Q: Where is it typically used?
A: It’s intended for wall, floor, and ceiling cavity applications in wood/engineered wood/steel framing (new construction or retrofit) per the provided product descriptions.
A quiet layer of luxury—performance wrapped in polished foil
There’s something undeniably refined about a home that feels calm—temperature steady, sound softened, comfort effortless. This FSK-faced fiberglass batt brings that elevated ease with a sleek foil finish that adds vapor resistance while supporting a cleaner, quieter interior. Use it behind walls and ceilings to create rooms that feel composed and cocooned, letting finishes and furnishings shine without drafts or noise. It’s the kind of behind-the-scenes essential that makes everyday living feel intentionally luxurious.
Upgrade your build with Johns Manville R-13 FSK-faced batts for efficient comfort, sound control, and code-friendly vapor resistance.
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