Johns Manville R-15 Kraft-faced fiberglass batts deliver thermal performance and sound control for 2x4 wood-stud walls. Pre-cut 15-in x 93-in batts cover 67.81 sq ft and include a kraft vapor retarder to help manage moisture while improving energy efficiency.
Key Features:
Designed for 2x4 Walls: Pre-cut 15-in x 93-in batts fit 16-in OC stud spacing for standard 8-ft walls
Thermal Performance: R-15 fiberglass helps improve energy efficiency and comfort
Built-In Vapor Retarder: Kraft facing provides moisture control with staple tabs for secure installation
Acoustic Benefit: Helps reduce sound transmission through interior partitions
Clean, Durable Material: Formaldehyde-free, will not rot, mildew, or corrode pipes and wiring
Specifications Table:
Specification
Details
Coverage Area
67.81 sq ft
Dimensions (per batt)
15 in W x 93 in L
Thickness
3.5 in
Faced/Unfaced
Kraft faced
Insulation Type
Fiberglass
R-Value
15
R-Value per Inch
4.2857
Stud Spacing
16 in OC
Framing Type
Wood studs
For Use in Walls
Yes
For Use in Basements
Yes
For Use in Attics
No
For Use in Ceilings
No
For Use in Crawlspaces
No
For Use in Floors
No
For Use in Doors
No
For Use in Duct
No
For Use in Electrical
No
For Use in Garage Doors
No
For Use in Masonry
No
For Use in Plumbing
No
For Use in Vents
No
For Use in Windows
No
Formaldehyde Free
Yes
Sound Barrier
Yes
Vapor Retardant
Yes (kraft)
ENERGY STAR Certified
Yes (program partner)
GREENGUARD Gold Certified
Yes
SCS Recycled Content
Certified
Warranty
1-year limited
Package Type
Multi-pack
Package Count
7 pieces
Total Package Quantity
35
Multi-Pack Quantity
5
Bag Dimensions (L x W x D)
20 x 20 x 50
UNSPSC
11162400
Fits 2 x 4 Walls
Yes
Fits 2 x 6 Walls
No
Maximum R-Value
15
Weight
32.4 lb
Frequently Asked Questions (FAQ):
Q: How much area does one package cover? A: One package covers 67.81 square feet.
Q: Is this insulation faced? A: Yes, it is kraft-faced and includes a built-in vapor retarder.
Q: What wall framing is it designed for? A: It’s designed for 2x4 wood-stud walls with 16-in on-center spacing.
Q: Can it be used in basements or ceilings? A: It’s suitable for basements and walls; it is not intended for attics or ceilings per the listed specifications.
Q: Is it formaldehyde-free and certified for indoor air quality? A: Yes, it is formaldehyde-free and GREENGUARD Gold Certified; it also carries SCS recycled content certification.
Quiet, Cozy Walls with a Clean, Crafted Finish
These kraft-faced batts slip into 2x4 walls like a tailored suit, instantly softening acoustics and sealing in comfort. The warm, paper-faced surface offers a tidy, purposeful look during install while the R-15 core does the heavy lifting behind the scenes. Pair it with crisp drywall and matte black hardware for a refined, modern envelope. It’s a smart, quiet luxury that elevates everyday living.
Upgrade your wall cavities with JM R-15 batts today for a quieter, more energy-efficient home.
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