Johns Manville R-38 Kraft-Faced Fiberglass Batt Insulation, 48-sq ft Coverage (16-in W x 48-in L, 12-in Thick)
Regular price $46.02R-38 Kraft-faced fiberglass attic batt insulation
High R-38 kraft-faced fiberglass batts designed for attics, ceilings, and floors. Precut 16 in x 48 in pieces provide 48 sq ft coverage per pack and include an integrated vapor retarder for moisture control and improved energy efficiency.
Key Features:
- Moisture Control: Kraft facing provides a built-in vapor retarder to manage humidity in attics and ceilings.
- Energy & Sound Performance: R-38 thermal rating enhances efficiency and helps reduce noise.
- Precut Convenience: 16-in x 48-in batts fit standard 16-in on-center framing; simple press-in installation.
- Durable Fiberglass: Will not rot, mildew, or corrode pipes, wiring, or metal studs; formaldehyde-free.
- Certified Air Quality: GREENGUARD Gold and SCS Recycled Content certifications; ENERGY STAR program partner.
Specifications Table:
| Specification | Details |
|---|---|
| Coverage Area (Sq. Feet) | 48 |
| Length (Inches) | 48 |
| Width (Inches) | 16 |
| Thickness (Inches) | 12 |
| Faced/Unfaced | Kraft faced |
| Insulation Type | Fiberglass |
| Maximum R-Value | 38 |
| R-Value per Inch | 3.1667 |
| Stud Spacing (Inches) | 16 |
| For Use in Attics | Yes |
| For Use in Ceilings | Yes |
| For Use in Floors | Yes |
| For Use in Basements | No |
| For Use in Crawlspaces | No |
| For Use in Walls | No |
| Sound Barrier | Yes |
| Vapor Retardant | Yes |
| Formaldehyde Free | Yes |
| ENERGY STAR Certified | Yes |
| GREENGUARD Gold Certified | Yes |
| Package Type | Individual pack |
| Package Count | 9 |
| Total Package Quantity | 9 |
| Bag Dimensions (L x W x D) | 16.5 x 20 x 49 |
| Warranty | 1-year limited |
| CA Residents: Prop 65 Warning(s) | No |
| UNSPSC | 11162400 |
Frequently Asked Questions (FAQ):
Q: How many pieces are in the package and what area will it cover?
A: There are 9 precut batts per pack, covering a total of 48 sq ft.
Q: What framing does it fit?
A: Designed for 16-in on-center wood studs/joists with each batt measuring 16 in W x 48 in L and 12 in thick.
Q: Where can I use it?
A: Ideal for attics and ceilings; also suitable for floors. Not intended for walls, basements, crawlspaces, or masonry.
Q: Is installation difficult?
A: Press batts into place between joists; staple the kraft tabs for added securement if required.
Q: Is it safe for indoor air quality?
A: Yes—formaldehyde-free fiberglass with GREENGUARD Gold certification and SCS certifications.
Wrap your home in quiet, cozy efficiency
These R-38 kraft-faced batts deliver a plush, architectural layer of performance—elevating an attic into a serene, climate-controlled envelope. The clean, uniform fibers and warm kraft facing create a tailored, professional finish. Pair them with crisp attic rulers and neat tab stapling for a refined install that looks as good as it performs. It’s a smart, luxurious upgrade that tempers seasons and softens sound with effortless poise.
Boost comfort and efficiency—add Johns Manville R-38 kraft-faced batts to your attic today.
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