At a Glance

R-Value per Inch: 2.93

Stud Spacing: 24 (In.)

Sound Barrier

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Johns Manville R- 30 Attic Kraft faced Fiberglass Batt Insulation 88-sq ft ( 24-in W x 48-in L)

Name: Johns Manville R- 30 Attic Kraft faced Fiberglass Batt Insulation 88-sq ft ( 24-in W x 48-in L)
Brand: Johns Manville
SKU: 3011690
Rating: 4.7 (193 reviews)

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4.7

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Faced/Unfaced: Kraft faced

Kraft faced

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Johns Manville formaldehyde-free kraft-faced thermal and acoustical insulation offers R-values up to R-49. It is ideal for moisture control in exterior walls, reduces sound transmission through walls, ceilings and floors. JM insulation is compression-packaged for space savings, and is offered in precut batts to fit standard wall cavities for both vertical and horizontal applications.

Kraft-faced fiberglass batt insulation for use in wood-framed attics, ceilings, and floors and provides a built-in vapor barrier for moisture control
Improves energy efficiency and provides sound control
Batts are pre-cut for use in attics with 24-in on-center joist spacing
Simple to install, press in place between ceiling joists and staple tabs to joists 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	Insulation Type	Fiberglass
Total Package Quantity	11	Package Count	11

Dimensions
Bag Dimensions (L x W x D)	24.5 x 20 x 50	Thickness (Inches)	10.25
Coverage Area (Sq. Feet)	88	Width (Inches)	24
Length (Inches)	48	R-Value per Inch	2.93
Package Weight (lbs.)	34.14	Maximum R-Value	30

Features
Faced/Unfaced	Kraft faced	Stud Spacing (Inches)	24
Formaldehyde Free	Yes	Vapor Retardant	Yes
Sound Barrier	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	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	No
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	No

Miscellaneous
UNSPSC	11162400

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Review

4.7 out of 5

193 Reviews

96% Recommend this product

Ratings may include incentivized customer reviews.

What Customers Are Saying

The insulation has excellent thermal performance, keeping homes much cooler and reducing energy usage. It is also very easy to install, with a simple and straightforward process. While some customers felt the product was reasonably priced, a few found it to be pricey. Overall, the majority of customers are highly satisfied with the insulation's quality and effectiveness.

Customer review summary generated by AI, including incentivized reviews.

193 Customer Reviews

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Already made a difference in my homes power usage

Would Recommend

It was easy to install

gb24October 29, 2025
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easy to install

Would Recommend

easy to install we used this in a pump house/ outside

jazunae88October 9, 2025
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Worth the higher cost.

Would Recommend

Really like the precut lengths. Makes installation easy and quick.

ForescoreSeptember 14, 2025
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Johns Manville R- 30 Attic Kraft faced Fiberglass Batt Insulation 88-sq ft ( 24-in W x 48-in L)

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