SKU: 27426303064

Johns Manville JM R-13 Unfaced Fiberglass Batt Insulation – 15 in x 93 in, 106.56 sq ft (11-Pack)

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Description

Johns Manville JM R-13 Unfaced Fiberglass Batt Insulation – 15 in x 93 in, 106.56 sq ft (11-Pack)R 13 Unfaced Fiberglass Wall Batt Insulation (15 in x 93 in) Johns Manville R 13 unfaced fiberglass batts are pre cut for standard 2x4 wood stud walls to help reduce heat loss and improve comfort. The formaldehyde free, unfaced design installs by friction fit between studs and also helps with sound control. Key Features: Sized for Standard 2x4 Walls: 15 in wide batts for 16 in on center wood stud cavities and 8 ft wall height. Thermal + Sound

R-13 Unfaced Fiberglass Wall Batt Insulation (15 in x 93 in)

Johns Manville R-13 unfaced fiberglass batts are pre-cut for standard 2x4 wood-stud walls to help reduce heat loss and improve comfort. The formaldehyde-free, unfaced design installs by friction-fit between studs and also helps with sound control.


Key Features:

  • Sized for Standard 2x4 Walls: 15-in wide batts for 16-in on-center wood stud cavities and 8-ft wall height.
  • Thermal + Sound Performance: R-13 insulation helps improve energy efficiency while providing sound control in interior wall assemblies.
  • Easy Friction-Fit Install: Unfaced batts press in place between studs and can be added over existing insulation.
  • Durable, Noncorrosive Material: Fiberglass won’t rot, mildew, or deteriorate and is noncorrosive to wiring, pipes, and metal components.
  • Indoor Air Quality & Efficiency Programs: Formaldehyde-free and ENERGY STAR/Greenguard certifications listed for this product line.

Specifications Table:

Specification Details
Product Name R-13, 15 in x 93 in, Unfaced, Fiberglass Batt Insulation, 106.56 sq-ft
Category Batt Insulation
Insulation Type Fiberglass
Maximum R-Value 13
Faced/Unfaced Unfaced
Width (Inches) 15
Length (Inches) 93
Thickness (Inches) 3.5
Coverage Area (Sq. Feet) 106.56
Total Package Quantity 11
Package Count 11
Package Type Individual pack
Stud Spacing (Inches) 16
Framing Type Wood studs
Fits 2 x 4 Walls Yes
Fits 2 x 6 Walls No
For Use in Walls Yes
For Use in Basements Yes
For Use in Crawlspaces No
For Use in Attics No
For Use in Ceilings No
For Use in Floors No
Sound Barrier Yes
Formaldehyde Free Yes
Vapor Retardant No
R-Value per Inch 3.7143
ENERGY STAR Certified Yes
GREENGUARD Gold Certified Yes
CA Residents: Prop 65 Warning(s) No
Bag Dimensions (L x W x D) 15.5 x 20 x 50
Package Weight (lbs.) 26.41
UNSPSC 11162400
For Use in Doors No
For Use in Duct No
For Use in Electrical No
For Use in Garage Doors No
For Use in Masonry No
For Use in Plumbing No
For Use in Vents No
For Use in Windows No

Frequently Asked Questions (FAQ):

Q: What wall cavities does this insulation fit?
A: It’s designed for 2x4 wood-stud walls with 16-in on-center spacing; each batt is 15 in wide and 93 in long.


Q: Is this batt faced or unfaced—and do I need a vapor retarder?
A: This product is unfaced and has no vapor retardant; follow local building code requirements for vapor control in your climate zone and application.


Q: How many batts are in a package and what area does it cover?
A: The pack includes 11 batts and covers 106.56 sq ft total.


Q: Where can it be used?
A: It’s listed for use in walls and basements (not for attics, ceilings, floors, or crawlspaces per the provided specs).


Q: Does it help with sound?
A: Yes—this item is listed as having a sound barrier and is described as providing noise control in interior walls.


Quiet, Comfortable Walls—Effortlessly Refined

Think of this unfaced fiberglass batt as the invisible foundation of a beautifully composed room—softening sound, steadying temperature, and making spaces feel instantly more serene. Its clean, friction-fit profile slips into standard stud bays, supporting a crisp wall finish without added bulk. Use it to elevate bedrooms, offices, or media rooms where hush and comfort matter most. True luxury isn’t always seen—it’s felt, in the calm your home holds.


Upgrade your wall comfort and quiet with JM R-13 unfaced fiberglass batts—sized to fit standard 2x4 cavities for a straightforward install.

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]
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SKU: 27426303064

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Iraq veteran 83
New York, US
★★★★★ 5
Very heavy and thick
Style: 30 sqft
I purchased mini brands of sound ending and this is by far the heaviest sound deadening I've ever ordered. I'm not installed yet but I have a good feeling that is going to work exceptionally in blocking sound. If weight is a concern for you I would recommend a lighter product however if sound quality and a quiet ride is your priority this is the one for you.
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Reviewed in the United States on March 18, 2026
D
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Dustin Felton
Belleville, US
★★★★★ 5
Siless Hybrid 3-in-1 - Far Exceeded my Expectations!!!
Model: SLH20025
I recently installed the Siless Hybrid 3-in-1 sound deadening mat in my vehicle, and I’m genuinely impressed. For just $80 for 25 square feet, this product delivers performance that rivals materials costing twice as much — and with far less hassle. If you're on the fence......Just buy it! You will not be disappointed. Easy to Install: Unlike traditional sound deadening products that are stiff, sharp, and temperature-sensitive, this mat is soft, flexible, and easy to work with. I cut it cleanly with regular scissors and pressed it into tight spaces using just my fingers, so if in you don't have a roller or install tool, a good pair of scissors and your hands can get the job done. With other brands like Dynamat, the aluminum layer often leaves micro cuts on your hands and tears up your fingertips, but Siless does not due the acoustic layer being on top and above the aluminum layer that holds the butyl layer. So, it's very easy on your hands. Even in cooler temperatures (around 50°F), I had no trouble applying it but it goes on better heated. If warm outside, I would leave the entire box out in the sun for at least 30 minutes when it's warm or heats it's very pliable and easy to mold. Make sure its where you want it because once applied it's not ever falling off. and it became even more pliable and easy to mold. No heat gun, no mess — just straightforward application. I installed 40–50 square feet throughout the interior, covering everything except the headliner and the flooring forward of the rear seat. The difference in cabin noise is astonishing. I can turn my radio up concert loud with gut-punching bass, and from outside the car, it sounds like a factory sound system at mid volume. I was blown away by how well it contains sound — both inside out and outside in. My exhaust is pretty aggressive and now is barely audible from inside the cabin. While driving, it almost sounds like a stock factory setup. The Siless matting actually changed the driving experience and feels refined. If you're skeptical about sound deadening gimmicks, I get it, but this is the first product I've used and when I needed more, I went Stright to the 3 in 1 Hybrid matting and purchased it again. I love researching before buying and that's very uncommon for me to do. Note: Proper installation is key, and it does take time and patience. But if installed correctly and in the right places, it works better previously used from paint-on sound deadening to Dynamat. Update Nov, 2025 After using it this in 4 separate vehicles now. I feel the Siless’s 3 in 1 Hybrid has nailed it for best budget deadener that is better than dynamat extreme in performance and installation Protip: buy a roll of 2-3” aluminum tape and tape the seams. After trimming the edges tend to very sticky between the panels. I ran a strip of aluminum tape over the seems to create a better seal and true moisture I used it on four vehicles now and have I have not been paid to review and purchased every order myself. 3 in 1 Hybrid deadener by Siless is the best all around easy to apply sound deadner period!
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Reviewed in the United States on September 29, 2025
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Tee & Cee
Birmingham, US
★★★★★ 5
Top quality
Model: SLH20025
This Siless Hybrid 3-in-1 sound deadening mat is easy to work with and feels high-quality. The butyl material is thick and pliable, making it simple to cut and fit into doors, floors, or panels. After installation, road noise and vibrations are noticeably reduced, and it also seems to improve the overall cabin feel. No bad smell. At 25 sq ft per roll, it’s a good value for anyone looking to dampen noise and improve car acoustics. Overall, a solid, effective option for automotive soundproofing. Used on a Fiesta ST.
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Reviewed in the United States on February 15, 2026
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Andy
Los Angeles, US
★★★★★ 5
Made a big improvement in cabin noise—highly recommend
Model: SLH20025
Siless Hybrid made a huge difference in reducing noise in the floor of my truck cabin. In some areas, there was basically just bare sheet metal between the inside and outside, so adding this really helped the truck feel more solid and noticeably quieter on the road. I used Kilmat on the doors, and honestly I wish I had used Siless Hybrid there too, but it was too late by the time I realized the difference. This material is very sticky, easy to cut, and simple to apply, which made the install pretty smooth. Just a heads-up: the tacky side gets messy and will bond to clothing really easily, so be careful during installation. Overall, I’d definitely buy it again—great product with real results.
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Reviewed in the United States on December 2, 2025
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AmazinFrank
Massapequa, US
★★★★★ 5
Very good product at a fair price
Model: SLH20025
Very good sound deadener and heat shield, it is a bit sticky to work with, but easy to shape and cut
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Reviewed in the United States on April 19, 2026

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