Johns Manville R-38 Kraft-Faced Fiberglass Batt Insulation, 48-sq ft Coverage, 16 in x 48 in (K1292S)
Regular price $78.91R-38 Kraft-Faced Fiberglass Batt Insulation, 48-sq ft
Formaldehyde-free, kraft-faced fiberglass batts designed for attics, ceilings and floors. Delivers R-38 thermal performance with integrated vapor retarder to improve energy efficiency and sound control.
Key Features:
- High R-Value Performance: R-38 batts help reduce heat loss and enhance home energy efficiency
- Built-In Vapor Retarder: Kraft facing provides moisture control for attic applications
- Formaldehyde-Free Fiberglass: Improves indoor air quality; GREENGUARD Gold certified
- Easy Installation: Precut 16 in x 48 in batts fit 16 in stud/joist spacing; staple tabs for securement
- Durable and Noncorrosive: Will not rot or mildew; safe for use around pipes and wiring
Specifications Table:
| Specification | Details |
|---|---|
| R-Value | 38 |
| Coverage Area | 48 sq ft per package |
| Piece Count | 9 pieces |
| Dimensions (per batt) | 16 in W x 48 in L x 12 in Thick |
| Stud/Joist Spacing | 16 in on center |
| Faced/Unfaced | Kraft faced (vapor retarder) |
| Insulation Type | Fiberglass |
| Formaldehyde Free | Yes |
| Sound Barrier | Yes |
| For Use in Attics | Yes |
| For Use in Ceilings | Yes |
| For Use in Floors | Yes |
| For Use in Walls | No |
| For Use in Basements/Crawlspaces | No |
| Width | 16 in |
| Length | 48 in |
| Thickness | 12 in |
| R-Value per Inch | 3.1666 |
| Package Weight | 28 lb |
| Bag Dimensions (L x W x D) | 49 in x 16.5 in x 20 in |
| Vapor Retardant | Yes |
| ENERGY STAR Certified | Yes (program partner) |
| GREENGUARD Gold Certified | Yes |
| Warranty | 1-year limited |
| UNSPSC | 11162400 |
Frequently Asked Questions (FAQ):
Q: How much area does one package cover?
A: Each package covers 48 sq ft with nine precut batts sized 16 in x 48 in.
Q: Where can this insulation be used?
A: It is intended for attics, ceilings, and floors with 16-in on-center wood stud/joist spacing; not for walls or basements.
Q: Is the product formaldehyde-free?
A: Yes, the fiberglass is formaldehyde-free and GREENGUARD Gold certified.
Q: Does the kraft facing act as a vapor retarder?
A: Yes, the kraft facing provides a built-in vapor retarder to help control moisture.
Q: What tools are recommended for installation?
A: Common tools include gloves and eyewear, long sleeves, a utility knife, caulk or spray foam, and an attic ruler.
Quiet, Cozy Attics with Effortless Warmth
This kraft-faced batt tucks neatly between joists, creating a seamless thermal blanket that quiets the home and elevates comfort. I love the crisp, pre-cut format—16 by 48 inches—because it installs beautifully and looks tidy even in hidden spaces. Pair it with clean attic decking and soft task lighting to transform storage zones into serene, efficient envelopes. It’s a refined foundation for luxurious, energy-smart living.
Upgrade your attic’s efficiency and comfort—choose these R-38 kraft-faced batts and start saving energy today.
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