Johns Manville R-19 Kraft-Faced Fiberglass Roll Insulation, 48.96-sq ft (15-in W x 39.167-ft L) – Individual Pack, B240

Regular price $45.05

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R-19 Kraft-Faced Fiberglass Roll Insulation, 15-in x 39.167-ft

Kraft-faced, formaldehyde-free fiberglass roll insulation designed for 2x6 wood-stud walls and floors. Delivers R-19 thermal performance with built-in vapor retarder to boost energy efficiency and sound control in long, unobstructed runs.


Key Features:

  • Built-In Vapor Retarder: Kraft facing controls moisture in concealed wall and floor applications
  • Energy & Sound Control: R-19 fiberglass improves thermal efficiency and reduces noise transfer
  • 2x6 Wood-Stud Fit: Sized for 16-in on-center framing; 15-in width, 39.167-ft length
  • Easy Installation: Press between studs and staple tabs for added securement
  • Healthy Indoor Air: Formaldehyde-free, GREENGUARD Gold and SCS certified

Specifications Table:

Specification Details
Coverage Area (Sq. Feet) 48.96
Length (Feet) 39.167
Thickness (Inches) 6.5
Width (Inches) 15
Faced/Unfaced Kraft faced
Fits 2 x 4 Walls No
Fits 2 x 6 Walls Yes
For Use in Floors Yes
For Use in Walls Yes
For Use in Attics No
For Use in Ceilings No
For Use in Basements No
For Use in Crawlspaces 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
Formaldehyde Free Yes
Framing Type Wood studs
Insulation Type Fiberglass
Maximum R-Value 19
R-Value per Inch 2.9231
Stud Spacing (Inches) 16
Reflective No
Sound Barrier Yes
Vapor Retardant Yes
ENERGY STAR Certified Yes
GREENGUARD Gold Certified Yes
SCS Recycled Content Certification Yes
Warranty 1-year limited
Package Type Individual pack
Package Count 1
Total Package Quantity 1
UNSPSC 30141500
Bag Dimensions (L x W x D) 15.5 x 19 x 26
Package Weight (lbs.) 12.01

Frequently Asked Questions (FAQ):

Q: Can this be used in 2x4 walls?
A: No. It is designed for 2x6 wood-stud walls and floors.


Q: Is the facing a vapor barrier?
A: Yes. The kraft facing functions as a vapor retarder for moisture control.


Q: What is the coverage per roll?
A: 48.96 square feet per individual roll.


Q: Is this insulation formaldehyde-free?
A: Yes, it is formaldehyde-free fiberglass.


Q: Does it help with sound control?
A: Yes. It provides sound barrier benefits in addition to thermal performance.


Warmth, Quiet, and Clean Lines for Your Walls

This kraft-faced roll tucks seamlessly into 2x6 studs, delivering a hushed, cozy envelope that elevates everyday living. The subtle paper facing creates a tidy, uniform backdrop during build-out while the R-19 core boosts comfort and efficiency. Use it to streamline long wall runs for an uncluttered installation that feels bespoke. It’s an essential layer for refined, luxurious spaces that live as beautifully as they look.


Upgrade your walls and floors with R-19 comfort—add this JM kraft-faced roll to your cart and start saving energy today.

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