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Comfortbatt R- 30.0 Attic Wall Unfaced Stone wool Batt Insulation 30-sq ft ( 23.0-in W x 47.0-in L)

Ratings & Reviews for ROCKWOOL Comfortbatt R- 30.0 Attic Wall Unfaced Stone wool Batt Insulation 30-sq ft ( 23.0-in W x 47.0-in L)

4.8
562
Review
 4.8 out of 5
562 Reviews


99% Recommend this product

Ratings may include incentivized customer reviews.

What Customers Are Saying

Customers overwhelmingly praise this insulation for exceptional thermal and acoustic performance, noting warmer homes, reduced energy costs, and significantly dampened noise. Installation is remarkably easy—it cuts smoothly, requires no special tools, causes no skin irritation, and fits snugly into tight spaces, making it ideal for DIY projects and renovations. Most customers declare they will never return to fiberglass, citing superior R-value, better durability, and resistance to fire, mold, water, and insects. A few mention blade dulling during large installations, but this minor drawback is vastly outweighed by overwhelming positive feedback.

Customer review summary generated by AI, including incentivized reviews.
562 Customer Reviews

Insulation

Would Recommend

Great product. Easy to work with

March 6, 2025
Verified PurchaserVerified Pro
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Cost Effective for Small Areas / Shallow Cavities

Would Recommend

This product is worth the money, especially if you need to insulate a very small area.I cut the batts in half to insulate the ceiling cavity between my kitchen and upstairs bathrooms. It was more cost-effective bag-for-bag than buying safe n sound.

February 5, 2025
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Great insulation

Would Recommend

I used this product to insulate the floor and ceiling of a large attic storage room before finishing it. I also used the R-15 version to insulate the walls. It is easy to handle, does not release particles into the air like fiberglass does (or at least much less so), cuts easily to fit around obstructions, and compresses for a tight fit. I would use it again in a heart beat.

January 15, 2025
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great product!

Would Recommend

Had to drive 3.5+ hrs each way to pick up but we needed insulation for our cathedral ceiling and it was either this or spray foam. Rockwool is very easy to install and can be cut to size with a bread knife. I also like that it doesn't cause your skin to become irritated or itch like fiberglass can

November 5, 2024
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Easy to install

Would Recommend

Easy to cut, does not compress easily, very little itching. Wish lowes carried the rolls as well.

August 30, 2024
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Incredible Insulation

Would Recommend

We installed R23 Comfortbatt in exterior walls, R24 in our I-Joist floor platform, and R38 plus a layer of R15 in the attic of our new construction owner-built house. What a huge difference it made in thermal comfort of the house, even before the vapor control layer and drywall was in. Love the resistance to fire, water, mold, insects, etc. and our DIY install was easy!

July 22, 2024

From rockwool.com

Product was fine. Delivery was delayed by a week

Product was fine. Delivery was false. Delayed by a week

July 22, 2024
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Easy Installation and Very Quiet

Would Recommend

I used the Rockwool R38 and R15 Comfortbatt in my garage build. I did a flash and bat method with 2" of spray foam and then the R15 Comfortbatt on the walls. Installation was easy and boy does it help knock the sound down. What a fantastic product!

July 21, 2024

From rockwool.com

Easy work

Would Recommend

Very easy to install

June 3, 2024
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Would Recommend

Excellent product. Horrible customer service experience with the pick up. Waited an hour for staff to actually get the order ready (yes, it was marked ready for pickup). A complete disaster.

May 8, 2024
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Really easy to install.

Would Recommend

Product was cheaper than other options, easy to use, and minimum mess.

March 1, 2024
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Worth the price in ease of use alone

Would Recommend

It was easy to cut and install. Very friendly to bare skin. Not much irritation lie traditional fiberglass. Safer amount of particulate released into the air, although always recommended to wear proper breathing protection. Has a better R-Value per inch than fiberglass. Don't let the increased price deter you. This is about as good as it gets before spray-in insulation and has a lot of the same benefits.

February 6, 2024
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Insulation

Would Recommend

How well it insulations our home.

January 19, 2024
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wear personal protection

Would Recommend

easy to work with

August 31, 2023
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Great Product

Would Recommend

Easy to work with. Not as itchy as the pink stuff. Easy to cut/notch.

August 1, 2023
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Response from Rockwool Team

Thank you Kwhit. A serrated knife always makes the cutting as easy as cutting a loaf of bread. Read More

Rockwool TeamAugust 17, 2023

rockwool

Perfect For Every Project

Would Recommend

I have been using ROCKWOOL since it was Roxul! The Comfortbatt thermal insulation offers a lot of big benefits. It’s easy to cut and install, holds its shape for a snug fit, resists mold, moisture and fire, all while providing reliable thermal performance. The stone wool batts are ideal for achieving a more durable and efficient home. I’ve trusted ROCKWOOL Comfortbatt insulation for my shows and personal projects for years! Disclosure: I am a long-standing ambassador of ROCKWOOL and its stone...

June 8, 2023

From rockwool.com