SKU: 58959867526

Johns Manville JM R-13 Unfaced Fiberglass Batt Insulation for 2x4 Walls, 15 in x 105 in, 120.31 sq ft

Sale price$66.15 Regular price$73.50
Save 10%

Shipping Estimate
USA
  • USA
  • CAN

Ships within 48 hours · Estimated delivery Jul 13 - Jul 18

Promo Codes Available:

For Your Every Summer RSVP, with Code: SUMMER15

Description

Johns Manville JM R-13 Unfaced Fiberglass Batt Insulation for 2x4 Walls, 15 in x 105 in, 120.31 sq ftR 13 Unfaced Fiberglass Batt Insulation (15 in x 105 in, 120. 31 sq ft) Johns Manville JM R 13 unfaced fiberglass batts are pre cut to fit standard 2x4 wood stud wall cavities for dependable thermal performance and sound control. The unfaced design (no vapor barrier) makes it easy to add to existing insulation where code allows. Key Features: Sized for 2x4 Wall Cavities: 15 in wide batts fit 16 in on center wood studs and standard 8 ft wall

R-13 Unfaced Fiberglass Batt Insulation (15 in x 105 in, 120.31 sq ft)

Johns Manville JM R-13 unfaced fiberglass batts are pre-cut to fit standard 2x4 wood-stud wall cavities for dependable thermal performance and sound control. The unfaced design (no vapor barrier) makes it easy to add to existing insulation where code allows.


Key Features:

  • Sized for 2x4 Wall Cavities: 15-in wide batts fit 16-in on-center wood studs and standard 8-ft wall applications.
  • Unfaced for Flexible Use: No vapor retarder—ideal for adding to existing insulation or where a separate vapor control layer is used.
  • Energy & Comfort Performance: R-13 thermal resistance helps reduce heat transfer and improve energy efficiency.
  • Sound Control: Fiberglass batt construction helps reduce sound transmission through wall assemblies.
  • Formaldehyde-Free & Durable: Formaldehyde-free insulation that won’t rot, mildew, or corrode pipes, wiring, or metal components.

Specifications Table:

Specification Details
Brand JM (Johns Manville)
Category Batt Insulation
Insulation Type Fiberglass
Maximum R-Value 13
R-Value per Inch 4.2857
Faced/Unfaced Unfaced
Vapor Retardant No
Width (in) 15
Length (in) 105
Thickness (in) 3.5
Coverage Area (sq ft) 120.31
Stud Spacing (in) 16
Fits 2 x 4 Walls Yes
Fits 2 x 6 Walls No
Framing Type Wood studs
For Use in Walls Yes
For Use in Basements Yes
For Use in Crawlspaces No
For Use in Ceilings No
For Use in Attics No
Sound Barrier Yes
Formaldehyde Free Yes
ENERGY STAR Certified Yes
GREENGUARD Gold Certified Yes
CA Residents: Prop 65 Warning(s) No
Package Type Multi-pack
Total Package Quantity 44
Package Count 11
Multi-Pack Quantity 4
Bag Dimensions (L x W x D) 20 x 20 x 50
Package Weight (lb) 19.81
Material Fiberglass
Manufacturer Johns Manville
Manufacturer Part # U1369
For use with Wood Stud Framing
Application For New Construction, Remodels, Walls, Floors, Ceilings, Basements, Attics and Crawlspaces
Flame Spread Index <25
Smoke Developed Index <50
Temperature Rating 850 deg F
Water Vapor Sorption <5 %
Standards/Certifications ASTM C665 Type I; ASTM E136; IBC; Energy Star Certified; Greenguard Gold Certified; Indoor Air Quality Certified; NAIMA 16 CFR Part 460; Recycled Content Certified
UNSPSC 11162400

Frequently Asked Questions (FAQ):

Q: What wall framing is this insulation designed for?
A: It’s designed for 2x4 wood-stud walls with 16-inch on-center stud spacing (15-inch wide batts).


Q: Does this batt insulation include a vapor barrier?
A: No—this product is unfaced and does not include a vapor retarder.


Q: Can I install it in basements?
A: Yes, it is listed for use in basements.


Q: How is it installed?
A: Batts are typically pressed into place between studs; they can also be cut to fit around obstructions as needed.


Q: What certifications does it have?
A: It is listed as ENERGY STAR Certified and GREENGUARD Gold Certified, and notes recycled content certification.


Quiet comfort, beautifully concealed.

Think of this as the invisible layer of luxury—softening sound and stabilizing temperature so a room feels instantly more refined. The unfaced fiberglass batt slips cleanly into 2x4 wall cavities, delivering R-13 performance without adding visual bulk. Pair it with intentional lighting and tactile wall finishes, and you’ll notice the difference: calmer acoustics, steadier comfort, and a home that feels thoughtfully composed. It’s the behind-the-walls essential that makes everyday living feel elevated.


Upgrade your 2x4 walls with JM R-13 unfaced batts for better comfort and sound control—add it to your project today.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 58959867526

Discover Niche Categories That Outsell

Top-Converting Item to Boost Your Average Order

4.4 ★★★★★
Based on 2063 reviews
Sort
Highest Rating
Newest First
Oldest First
Product Reviews
S
Verified Purchase
Shopper
Grantham, US
★★★★★ 5
Good stuff !
Model: 36 SqFt(3.4 SqM), Model: 36 SqFt(3.4 SqM)
This is an excellent product. Easily moldable, cuttable with good scissors or razor knife, very sticky, works great. This pack was enough to do all 4 doors on a crew max truck, and I went wild on the fronts. I used 9 peices on each rear door which was just enough, and the rest on the fronts. I doubled up layers and even used some on the back of the door panels. If you follow the instructions and dont go wild you might even have extra left over. It works just like you would imagine. Without doing the entire cab there will still be road noise but this helped noise, better audio, no buzzing door panels, terrific improvement. It is kind of heavy, so extra weight is added to truck, but that really isnt a bad thing. It is noticable but in a good way. Get it. Use it.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 20, 2026
O
Verified Purchase
Odin M Turner
Alexandria, US
★★★★★ 4
Good product
Model: 36 SqFt(3.4 SqM)
Easy to roll out. Works great  Why did you pick this product vs others?: Fair price for the amount of coverage, good quality  Works well: Easy to install, rolls out great. Forms to contours well
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on July 13, 2025
B
Verified Purchase
BRIAN HEATH
Cuba, US
★★★★★ 5
Great product
Model: 36 SqFt(3.4 SqM)
I used this on the doors of a Toyota Tacoma, worked as it described. Reduced the road noise significantly.. Need to buy another box for the floor and roof of the truck..
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 15, 2026
T
Verified Purchase
TimtheK
Lexington, US
★★★★★ 5
Great product - Add foam product for complete solution
Model: 36 SqFt(3.4 SqM)
Used in two cars with speaker upgrades. Easy to install but get the roller for assured adhesion.removes "tinnyness" from large metal resonators. Use with foam absorptive material for a complete system.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 14, 2026
T
Verified Purchase
TitothePinkTorpedo
Chelsea, US
★★★★★ 5
Great Product for noise reduction in Auto Use.
Model: 36 SqFt(3.4 SqM)
I use this on many builds to dampen the metal echo in cars, vans, and trucks. Just one sheet in the center of a body panel is a huge difference maker. You can also cover the entire surface and get added insulation value. The noise is greatly depleted and it's easy to install with a roller tool. Looks Great when done. Good Product I will use again!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 29, 2025

recommand products