Johns Manville R- 38 Attic Unfaced Fiberglass Batt Insulation 64-sq ft ( 24-in W x 48-in L)

Name: Johns Manville R- 38 Attic Unfaced Fiberglass Batt Insulation 64-sq ft ( 24-in W x 48-in L)
Brand: Johns Manville
SKU: 1000165161
Rating: 3 (4 reviews)

Get Pricing & Availability

Fiberglass batt insulation for use in wood-framed attics, ceilings and floors
Unfaced fiberglass batts do not have a vapor barrier and can be added to existing insulation
Improves energy efficiency and provides sound control

How to Calculate

Add % for any waste or extra

Members save more.

This item is no longer sold on Lowes.com

Best Price. Guaranteed

Find a lower price on an exact item? We'll match it. Some exclusions apply.

Learn More

FREE Returns

Return it in store or ship it back for free. Eligibility rules apply.

Learn More

FREE Shipping

Delivery is on us for orders over $45. Some exclusions apply.

Learn More

Johns Manville Formaldehyde-free unfaced thermal and acoustical insulation offers R-Values up to R-49. It can be added to existing insulation in attics and ceilings. JM insulation is compression-packaged for space savings, and is offered in precut batts to fit standard cavities for both vertical and horizontal applications.

Fiberglass batt insulation for use in wood-framed attics, ceilings and floors
Unfaced fiberglass batts do not have a vapor barrier and can be added to existing insulation
Improves energy efficiency and provides sound control
Batts are pre-cut in standard 4-ft length for use with 24-in on-center joist spacing
Simple to install, press in place between joists
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	Multi-pack	Package Count	8
Total Package Quantity	32	Framing Type	Wood studs
Insulation Type	Fiberglass

Dimensions
Bag Dimensions (L x W x D)	20 x 20 x 50	Thickness (Inches)	13
Coverage Area (Sq. Feet)	64	Width (Inches)	24
Length (Inches)	48	R-Value per Inch	2.923
Package Weight (lbs.)	37	Maximum R-Value	38

Features
Faced/Unfaced	Unfaced	Sound Barrier	Yes
Formaldehyde Free	Yes	Stud Spacing (Inches)	24
Multi-Pack Quantity	4	Vapor Retardant	No

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

Warranty
Warranty	1-year limited

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

Review

3 out of 5

4 Reviews

4 Star

3 Star

2 Star

50% Recommend this product

Ratings may include incentivized customer reviews.

4 Customer Reviews

Sort By

Customer Sentiment

Customer liked

Customers didn't like

Worked Great.

Would Recommend

Worked great.

NastynateMarch 10, 2025
From R- 38 Attic Unfaced Fiberglass Batt Insulation 64-sq ft ( 24-in W x 48-in L) Verified Purchaser

Was this Review Helpful ?

Be prepared to wait.

Would Not Recommend

Have had multiple delivery dates changed with the last one being 3 hours before delivery. What do I do with the guys hired to help? It's been over 7 weeks of waiting and they've pushed delivery another 3+ weeks with a maybe it'll happen, maybe not attitude. Supply chain excuses don't fly anymore, guys. Everyone else has got it sorted out when there's not a chip involved. If you order this, I hope you don't need it when you expect it.

Attic_waitingSeptember 13, 2024

Was this Review Helpful ?

Response from JohnsManvilleTeam

I am sorry to hear about your issues - if you'd like more information from someone here at JM, pleae email [email protected] and someone will b...

Deals by Department

Don't Miss These Deals

More Ways to Save

Johns Manville R- 38 Attic Unfaced Fiberglass Batt Insulation 64-sq ft ( 24-in W x 48-in L)

AREA1 - 0 Square Feet

Overview

Product Features

Specifications

Community Q & A

Johns Manville: Featured Videos

AREA1
- 0 Square Feet