Name: Johns Manville R- 19 Wall Kraft faced Fiberglass Roll Insulation 48.96-sq ft ( 15-in W x 39.167-ft L ) Individual pack
Brand: Johns Manville
SKU: 3018337
Rating: 4.7 (1478 reviews)

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Johns Manville Whole Home Comfort Collection

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Johns Manville kraft-faced formaldehyde-free™ fiber glass insulation is paper-faced to help control moisture in concealed applications such as exterior walls.

Kraft-faced fiberglass roll insulation for use in 2x6 wood-framed walls and floors, and provides a built-in vapor barrier for moisture control
Improves energy efficiency and provides sound control
Rolls are designed for long, unobstructed spaces with 16-in on-center stud spacing
Simple to install, press in place between studs and staple tabs to framing if additional securement is required
Will not rot, mildew or deteriorate and is noncorrosive to pipes, wiring and metal studs
JM is a partner of the Seal and Insulate with ENERGY STAR program
SCS Recycled Content certification
GREENGUARD Gold Certified for office indoor air quality and SCS Certified for home indoor air quality

General
Package Type	Individual pack	Package Count	1
Total Package Quantity	1	Framing Type	Wood studs
Insulation Type	Fiberglass

Dimensions
Bag Dimensions (L x W x D)	15.5 x 19 x 26	Thickness (Inches)	6.5
Coverage Area (Sq. Feet)	48.96	Width (Inches)	15
Length (Feet)	39.167	R-Value per Inch	2.92
Package Weight (lbs.)	12.01	Maximum R-Value	19

Features
Faced/Unfaced	Kraft faced	Sound Barrier	Yes
Formaldehyde Free	Yes	Stud Spacing (Inches)	16
Reflective	No	Vapor Retardant	Yes

Certifications
CA Residents: Prop 65 Warning(s)	No	GREENGUARD Gold Certified	Yes
ENERGY STAR Certified	Yes

Warranty
Warranty	Limited lifetime

Compatibility
For Use in Basements	No	For Use in Garage Doors	No
For Use in Crawlspaces	No	For Use in Masonry	No
For Use in Ceilings	No	For Use in Plumbing	No
For Use in Attics	No	For Use in Vents	No
For Use in Doors	No	For Use in Walls	Yes
For Use in Duct	No	For Use in Windows	No
For Use in Electrical	No	Fits 2 x 4 Walls	No
For Use in Floors	Yes	Fits 2 x 6 Walls	Yes

Miscellaneous
UNSPSC	30141500

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Review

4.7 out of 5

1478 Reviews

96% Recommend this product

Ratings may include incentivized customer reviews.

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+ 40

What Customers Are Saying

This insulation product is praised for its excellent insulation quality, ease of use, and good value. The encapsulated design with plastic wrap is highlighted as a key benefit, as it helps reduce skin irritation and makes the insulation cleaner to handle. Overall, this is considered a high-quality, effective, and user-friendly option that can improve home comfort and energy efficiency.

Customer review summary generated by AI, including incentivized reviews.

1480 Customer Reviews

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45 minute wait to pick up order

Would Not Recommend

After paying for order, I had to wait in the pickup area for over 45 minutes for my order to be placed in my truck.

Tobybg5July 20, 2026
From R- 13 Wall Kraft faced Fiberglass Roll Insulation 40-sq ft ( 15-in W x 32-ft L ) Individual pack Verified Purchaser

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Response from JohnsManvilleTeam

Thank you for choosing Johns Manville for your project - We are sorry to hear you did not have a great experience. If you have any additional feedbac...

JohnsManvilleTeamJuly 23, 2026

50 Rolls down

Would Recommend

Over the past 4 years I have puchased 50 rolls to replace all the insulation in the walls and ceiling in a home up in the White Mountains. This keeps outdoor noice down, keeps the heat in during the winter and cooler in the summer. Cuts well and all rolls were in perfect start up condition.

Insulation QueenJuly 13, 2026
From R- 13 Wall Kraft faced Fiberglass Roll Insulation 40-sq ft ( 15-in W x 32-ft L ) Individual pack Verified Purchaser

https://photos-us.bazaarvoice.com/photo/2/cGhvdG86bG93ZXM/cfcd0d6d-8d80-5535-bed3-0184efd553c8

https://photos-us.bazaarvoice.com/photo/2/cGhvdG86bG93ZXM/2eafcf23-8cb9-531a-9b13-df130d2dc3ba

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Helper/Protection item that provides the the home

NightmovesJuly 3, 2026
From R- 13 Wall Kraft faced Fiberglass Roll Insulation 40-sq ft ( 15-in W x 32-ft L ) Individual pack Verified Purchaser

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Johns Manville R- 19 Wall Kraft faced Fiberglass Roll Insulation 48.96-sq ft ( 15-in W x 39.167-ft L ) Individual pack

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