SKU: 60511243739

JM R-21 Kraft-Faced Fiberglass Batt Insulation, 15 in. x 93 in., 67.81 sq. ft. (7-Piece Bag)

Sale price$175.64 Regular price$195.15
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Description

JM R-21 Kraft-Faced Fiberglass Batt Insulation, 15 in. x 93 in., 67.81 sq. ft. (7-Piece Bag)R 21 Kraft Faced Fiberglass Wall Batt Insulation JM R 21 kraft faced fiberglass batts are pre cut to fit 2x6 wall cavities for efficient thermal performance and added sound control. The kraft facing provides a built in vapor retarder to help manage moisture in wood framed walls and basements. Key Features: Pre Cut for 2x6 Walls: Designed for standard 8 ft walls with 16 in on center stud spacing (15 in. x 93 in. batts). Built In Vapor Retarder: Kraft

R-21 Kraft-Faced Fiberglass Wall Batt Insulation

JM R-21 kraft-faced fiberglass batts are pre-cut to fit 2x6 wall cavities for efficient thermal performance and added sound control. The kraft facing provides a built-in vapor retarder to help manage moisture in wood-framed walls and basements.


Key Features:

  • Pre-Cut for 2x6 Walls: Designed for standard 8-ft walls with 16-in on-center stud spacing (15 in. x 93 in. batts).
  • Built-In Vapor Retarder: Kraft facing helps control moisture when installed against framing in exterior wall applications.
  • Comfort & Quiet: Improves energy efficiency while helping reduce sound transmission through walls.
  • Formaldehyde-Free Fiberglass: Made with formaldehyde-free fiberglass insulation for indoor comfort.
  • Durable, Stable Batts: Dimensionally stable fiberglass resists slumping, settling, or breakdown in normal applications.

Please check the Product Data Sheet Here


Specifications Table:

Specification Details
Insulation Type Fiberglass batt
R-Value R-21
Coverage Area 67.81 sq ft
Batt Width 15 in
Batt Length 93 in (7.75 ft)
Thickness 5.5 in
Pieces per Bag 7
Stud Spacing 16 in on-center
Fits Wall Size 2 x 6 wall
Faced/Unfaced Kraft faced
Vapor Retardant Yes
Sound Barrier/Sound Control Yes
Formaldehyde Free Yes
Framing Type Wood studs
For Use in Walls Yes
For Use in Basements Yes
ENERGY STAR Certified Yes
GREENGUARD Gold Certified Yes
SCS Recycled Content Certification Yes
Warranty 1-year limited
Package Type Multi-pack
Total Package Quantity / Package Count 7
R-Value per Inch 3.8181
Bag Dimensions (L x W x D) 20 x 20 x 50

Frequently Asked Questions (FAQ):

Q: What stud cavity does this insulation fit?
A: It’s sized for 2x6 wood-stud wall cavities with 16-in on-center spacing (15 in. wide batts).


Q: Does the kraft facing act as a vapor barrier?
A: Yes. The kraft facing is a vapor retarder intended to help with moisture control when installed properly.


Q: How much area does one bag cover?
A: One bag covers 67.81 sq. ft.


Q: How many batts come in a bag?
A: The bag contains 7 pieces (batts).


Q: Where can it be used?
A: It’s commonly used in walls and basements; it’s also listed for use in walls, floors, and crawl spaces depending on the retailer listing and application needs.


Quiet Luxury Starts Behind the Walls

True comfort is architectural—felt in the hush of a room and the steady calm of temperature that never calls attention to itself. These R-21 kraft-faced fiberglass batts slip into 2x6 cavities with a tailored fit, while the kraft facing adds a thoughtful layer of moisture control. Use them to elevate bedrooms, home offices, or any space where serenity is the ultimate finish. It’s the invisible upgrade that makes a home feel undeniably luxe.


Upgrade your 2x6 walls with JM R-21 kraft-faced batts for efficient comfort, moisture control, and quieter rooms.

Warranty

Installation

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: 60511243739

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4.2 ★★★★★
Based on 26 reviews
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Verified Purchase
Luis s.
Natrona Heights, US
★★★★★ 5
Buen producto
Color: Upgraded Version - Gray
Execelente
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 15, 2025
A
Amazon Customer
Louisville, US
★★★★★ 5
Mag-Safe Magnetic
Great product! The MagSafe compatibility is perfect—it snaps right on instantly. I prefer this over the wireless charging mounts because those always seem to overheat my phone on long trips. This is lightweight, stable, and the all-black aesthetic blends right into the Tesla screen frame. 10/10 for any Tesla owner.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 15, 2026
S
SuperBanker
Belleville, US
★★★★★ 4
Perfect Little Mount for Tesla Drivers
I like that this Tesla phone mount snaps onto the back of the screen cleanly and holds my iPhone with a strong MagSafe grip. It keeps the phone right where I need it without blocking the view, and the adjustable angle makes navigation super easy to see while driving. I do not like that it can wobble a tiny bit on rough roads, and the magnet isn’t as strong if you’re using a thicker case. Overall, a great accessory that makes the Model 3/Y setup even more convenient!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 14, 2025
P
photogirl5
Battle Creek, US
★★★★★ 5
Tesla MagSafe mount for phone
Very cool phone mount that I hadn’t thought to purchase until I saw it as an option on Vine. Easy to install using the included adhesive strips pre-attached to the mount. It has a nice firm grip on the MagSafe for the phone and the mount itself sticks very well to the back of the Tesla screen with no issues. It is in the perfect location in the dashboard area as it doesn’t block any view or buttons. No negative aspects to my experience with this product.
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Reviewed in the United States on December 21, 2025
J
J. Youm
Boise, US
★★★★★ 4
Arm can be positioned in many ways, but doesn't grip as hard and the phone rattles in rough roads
I liked how this product looked in the picture so I ordered it. But when I installed it, I found out that it doesn't have the same amount of "grip power" because you have to turn a little knob on the side to tighten the grip and it's not that easy to do compared to other screw type phone mounts that have bigger screws. The magnet was slightly weaker than my existing phone holder but it was adequately strong. It was good to see how one could position the phone in different positions due to the way the arm is designed to be moved and adjusted. But the one biggest thing I didn't like is how the phone kept on shaking/rattling when I drove over rough roads. The metal arm is quite thin and although it's metal and not plastic, due to the thinness of the material, it was easily rattled and made the phone rattle a lot in return. Over smooth roads this won't be a big problem though. I wasn't quite satisfied with this, although it's adequately good enough.
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Reviewed in the United States on October 3, 2025

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