At a Glance

Fits 2 x 4 Walls

Stud Spacing: 16 (in)

Framing Type: Steel studs

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Johns Manville Multi-Purpose R- Attic Wall Unfaced Fiberglass Roll Insulation 5.33-sq ft ( 16-in W x 4-ft L ) Individual pack

Name: Johns Manville Multi-Purpose R- Attic Wall Unfaced Fiberglass Roll Insulation 5.33-sq ft ( 16-in W x 4-ft L ) Individual pack
Brand: Johns Manville
SKU: 3364428
Rating: 4.7 (486 reviews)

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4.7

486

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Maximum R-Value: 0

30.0

Width (Inches): 16

15.0

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This Item Is Featured In

Johns Manville Attic Protector Collection

Johns Manville Garage Collection

Johns Manville Crawl Space Insulation Collection

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Johns Manville unfaced batts and rolls effectively control heat flow to the outside and unwanted noise inside.

For small projects and for filling gaps in attics, basements, crawlspaces, ceilings and walls
Unfaced fiberglass rolls do not have a vapor barrier and can be added to existing insulation
Improves energy efficiency and provides sound control
Rolls are designed for long, unobstructed spaces
Simple to install, press in place between studs
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
Series Name	Multi-Purpose	Insulation Type	Fiberglass
Package Type	Individual pack	Package Count	1
Total Package Quantity	1	Framing Type	Steel studs

Dimensions
Bag Dimensions (L x W x D)	16X5X4.5	Thickness (Inches)	2
Coverage Area (Sq. Feet)	5.33	Width (Inches)	16
Length (Feet)	4	R-Value per Inch	0
Package Weight (lbs.)	0.47	Maximum R-Value	0

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

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	Yes	For Use in Garage Doors	No
For Use in Crawlspaces	Yes	For Use in Masonry	No
For Use in Ceilings	Yes	For Use in Plumbing	No
For Use in Attics	Yes	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	Yes
For Use in Floors	No	Fits 2 x 6 Walls	No

Miscellaneous
UNSPSC	30141500

Check out the Best Selling Roll Insulation on Lowes.com

Review

4.7 out of 5

486 Reviews

94% Recommend this product

Ratings may include incentivized customer reviews.

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+ 9

What Customers Are Saying

This high-quality fiberglass insulation provides excellent thermal and sound insulation. Customers report it is easy to install, with the insulation expanding and fluffing up quickly. Many found it less itchy and easier to work with compared to other options. The insulation is versatile, suitable for a variety of applications like attics, walls, and small gaps. Customers were able to achieve significant improvements in temperature regulation and energy efficiency after installation.

Customer review summary generated by AI, including incentivized reviews.

486 Customer Reviews

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Good stuff easy to work with.

Tomball writerJuly 19, 2026
From R- 30.0 Attic Unfaced Fiberglass Roll Insulation 31.25-sq ft ( 15.0-in W x 25.0-ft L ) Individual pack Verified Purchaser

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Filled in chimney to prevent cold air and moistur.

Would Recommend

MyselfJune 24, 2026
Verified Purchaser

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I thought is was a little skimpy, thought it would

Would Not Recommend

pickleJune 3, 2026
Verified Purchaser

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Response from JohnsManvilleTeam

Thank you for choosing Johns Manville for your project - If you have any additional feedback you'd like to share about your experience, please fe...

JohnsManvilleTeamJune 4, 2026

Works

Would Recommend

Handy size

Cody DogMay 23, 2026
Verified Purchaser

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Insulation for a crawl space, steel wire supports

F iberousus!

LarryMay 14, 2026
From R- 30.0 Attic Unfaced Fiberglass Roll Insulation 31.25-sq ft ( 15.0-in W x 25.0-ft L ) Individual pack Verified Purchaser

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Easy to Install

Would Recommend

Easy to install

PoseyMay 2, 2026
From R- 30.0 Attic Unfaced Fiberglass Roll Insulation 31.25-sq ft ( 15.0-in W x 25.0-ft L ) Individual pack Verified Purchaser

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78 Questions

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Johns Manville Multi-Purpose R- Attic Wall Unfaced Fiberglass Roll Insulation 5.33-sq ft ( 16-in W x 4-ft L ) Individual pack

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