SKU: 74287243240

Knauf Insulation EcoBatt R-11 Unfaced Fiberglass Insulation Batts, 3.5 in. x 23.25 in. x 93 in., 240.25 Sq. Ft. (8 Bags)

Sale price$299.12 Regular price$332.35
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Description

Knauf Insulation EcoBatt R-11 Unfaced Fiberglass Insulation Batts, 3.5 in. x 23.25 in. x 93 in., 240.25 Sq. Ft. (8 Bags)EcoBatt R 11 Unfaced Fiberglass Insulation Batts, 3. 5 x 23. 25 x 93 in EcoBatt R 11 unfaced fiberglass batts deliver reliable thermal and sound control for walls and floors. Sized 3. 5 in. x 23. 25 in. x 93 in., this bundle covers 240. 25 sq. ft. across 8 bags and uses formaldehyde free ECOSE technology for better indoor air quality. Key Features: Thermal Performance: R 11 rating for exterior walls and interior partitions ECOSE Technology:

EcoBatt R-11 Unfaced Fiberglass Insulation Batts, 3.5 x 23.25 x 93 in

EcoBatt R-11 unfaced fiberglass batts deliver reliable thermal and sound control for walls and floors. Sized 3.5 in. x 23.25 in. x 93 in., this bundle covers 240.25 sq. ft. across 8 bags and uses formaldehyde-free ECOSE technology for better indoor air quality.


Key Features:

  • Thermal Performance: R-11 rating for exterior walls and interior partitions
  • ECOSE Technology: Formaldehyde-free binder supports healthier indoor air
  • Acoustic Comfort: Helps reduce noise transfer between rooms and floors
  • Easy to Handle: Soft, less itchy batts that cut and friction-fit between studs
  • Sustainable Content: Made with recycled glass and naturally brown, dye-free binder

Please check the Product Data Sheet Here


Specifications Table:

Specification Details
Insulation type Fiberglass batt
Product series EcoBatt
R-value R-11
Facing Unfaced
Thickness 3.5 in
Width 23.25 in
Length 93 in
Total coverage 240.25 sq ft (8 bags)
Binder Formaldehyde-free ECOSE technology
Recycled content Minimum 50% post-consumer (third-party certified)
Acoustic use Helps reduce sound transmission in interior walls and floors
Available widths (reference) 15.25 in, 16 in, 19 in, 23.25 in, 24 in
Fire rating (reference) ASTM E136
Application Wood or metal framing; new construction or retrofit

Frequently Asked Questions (FAQ):

Q: Is this insulation faced or unfaced?
A: Unfaced—ideal where a separate vapor retarder is not required.


Q: What are the batt dimensions?
A: Each batt is 3.5 in. thick, 23.25 in. wide, and 93 in. long.


Q: How much area does the package cover?
A: Total coverage is approximately 240.25 square feet across 8 bags.


Q: Is the product formaldehyde-free?
A: Yes, it uses ECOSE technology with a formaldehyde-free binder.


Q: Where can I use R-11 batts?
A: Commonly used in 2x4 exterior walls and interior walls for thermal and sound control; follow local codes.


Quiet Comfort, Naturally Refined

EcoBatt’s whisper-soft fibers tuck neatly into stud bays, creating a serene, cocooned envelope that elevates everyday living. I love the naturally warm hue—an honest materiality that speaks to sustainable craftsmanship. Pair it with smooth gypsum walls and pale oak floors to let the tranquility shine. For elevated luxury, start with silence—this insulation is the foundation of a beautifully composed home.


Upgrade your walls with EcoBatt R-11 today for quieter, more energy‑efficient comfort that lasts.

Installation

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
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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: 74287243240

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4.9 ★★★★★
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napoli
Grantham, US
★★★★★ 4
Good deal for the price
Style: 80 mil 18 SqFt
The product is good and contrary to some comments I read it was not a mess to install and went on very nicely. That said I placed on a 71 Baracudda and starting from a 71db I was able to drop that down to about 66 with two layers Kilmatt 80mil
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 18, 2026
F
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#1 Ford
Port Orchard, US
★★★★★ 5
Kilmat Car Sound Deadening Mats
Style: 50 mil 25 SqFt
Easy to install in a vehicle! Helps keep the heat out as well as keeping it quieter inside my car. Self sticking to the inside of the roof without strong smelling adhesives. The quality of these pieces work very well in my vehicle!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 19, 2026
J
Verified Purchase
Jonathan Robledo
Massapequa, US
★★★★★ 5
Excellent Sound Deadening Material!
Style: 10 SqFt, Style: 10 SqFt
I installed Kilmat Sound Deadening in my truck, and I’m extremely impressed with the results. The material is thick, pliable, and easy to cut to fit doors, floor panels. It sticks very well to metal surfaces and doesn’t peel, even after heating it slightly to make it more flexible. After installation, I immediately noticed a reduction in road noise and vibrations. Worth the money!!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 4, 2026
J
Verified Purchase
Jare
San Leandro, US
★★★★★ 5
A Must Have For Car Restorations!
Style: 80 mil 36 sqft, Style: 80 mil 36 sqft
I have been installing this matting in my 74 Datsun 260Z restore and very pleased with the ease of application and overall quality. My car has bedliner coating inside and this stuff sticks extremely well and is easy to trim and shape as well. I have just started installing it and using the rollers to work it in place but I can already tell a difference with just the little bit I have added....has reduced the resonance in the metal already. It's not a fast process but know it will be very rewarding once complete.
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Reviewed in the United States on May 9, 2026
M
Verified Purchase
Mike
Massapequa, US
★★★★★ 5
Great sound mat for the price!
Style: 50 mil 50 SqFt, Style: 50 mil 50 SqFt
This is a good product. Many people go with KILMAT because of the value to price point. I did as well. When you clean the surface (in my case it was all painted metal) this stuff sticks very well. I do recommend you use a seam roller of some type, I used Lumiteco 3 piece roller set. This will help with adhesion and mostly flatten the overlapped edges. It also helps you see where you have rolled as it leaves little grooves. The difference when we had no sound mats and after was very impressive. We haven't finished our install yet and it is quieter than when we had an interior in the van. There are thicker mats available in other brands, but this will work great for our van build, but this helps keep the weight down. It is quality material, just be careful when you are removing the backing, the edge of the foil face can cut you. I suggest you layout where you are installing the mat and cut to fit. From what I have read, you don't need to cover every inch in the vehicle, just spot install for a big difference. I chose to cover most surfaces to help keep sound out when we are sleeping in the van. We haven't finished putting the van yet, but we have driven it around and been very satisfied with this product.
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Reviewed in the United States on December 3, 2025

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