Ratings & Reviews for ROCKWOOL Comfortbatt R- 23.0 Attic Wall Unfaced Stone wool Batt Insulation 39.8-sq ft ( 15.25-in W x 47.0-in L)

The best choice for contractors.

My crew and I install Comfortbatt on a regular basis for residential projects. Both new construction and renovations can benefit from the many features of Rockwool such as fire resistance and sound deadening. One huge reason to use it in our coastal area of western Canada is the resistance to humidity and moisture. It’s the perfect product!

Filling every wall with it

One particular YouTube channel turned me on to this product. I bought a 50’s home that still had some weird Kimsul insulation in it. The R3ish this stuff was won’t cut it in New England winters. Gutted the second floor first and every wall upstairs now has rockwool in it. I love it. I don’t hear the highway anymore, the rooms stay perfect temp with the mini splits only. Easy to install and love how you can carve out the batt to fit where you need it. Going to put another order in soon for the fi...

Rockwool R30 attic install

I installed the Rockwool comfortbatt in my attic over this last winter in hopes that it would help keep my home cool over this summer. In my opinion it helped a lot, that being said there was no insulation in my attic before the rockwool. I will be installing some Rockwool in my crawl space over the next winter hoping this helps keep the heat/coolness in the home even better. Shawn Solis

It’s great

This insulation is great, super easy to work with and great value. Thank you for making a great product.

Safe and quiet

I’ve used Rockwool insulation behind walls and under joists to isolate the sound in the TV room from the surrounding rooms. It performs well and was easy to install. I will use it again soon in my attic. Our furnace is in the attic and I believe that adding Rockwool insulation between the rafters will help to keep the attic cooler in the summer which will lower my AC costs.

Hands Down Bar None Best Insulation

Rockwool ComfortBatt is such a great product that is easy to use, easy to install, and gives so many benefits to our new custom homes. After installing it on my personal home I am convinced it is the best product out there. It went in so fast, wasn’t very messy, and that is before all of the benefits you get with any Rockwool product. Quiet, stable, fire and water resistant…this is going to be a lifelong high performance product.

Best fire resistant insulation!

I finally got around to fire stopping my garage since I live above it, and I chose Rockwool to fill joist cavities and pipe and wire penetrations. Rockwool is not only fire resistant but also has the best sound deadening properties out of any insulation on the market, and that’s great when I have to leave for work and my wife is still sleeping I know the noise of the car will not wake her up!!! I did tons of research on mineral wool insulation and Rockwool is the original best product to pro...

Comfort Batt for the win...AGAIN

We have been using RockWool on our interior residential renovation products for quite some time. It is a no brainer for us and for us to utilize on our projects. Its resistance to mold, rot, mold, and mildew because it is made of spun stone that cannot absorb and hold water is amazing and a game changer. It also offers incredible sound reduction and fire resistance. It is fluffy, holds its shape in the wall cavity, easy to trim down, and is not itchy fiberglass. Love it and love everything ...

Excellent product that is an easy install

Very easy to work with and cut to fit around everything.

Will be using this from now on

Excellent product/not nearly as itchy as fiberglass/stays in place-no stapling/very easy to cut/better sound proofing/better insulating power. I can’t understand why anyone would want to use fiberglass insulation after using this. It’s a dream in comparison.

Some are harder than others

Rockwool is a good product and I will continue to use it. The hardness of the batts is not consistent from one batt to the next. Not really a problem if you handle every piece like it is soft. Some of the batts were wet so I had to let them dry out. Make sure that any batts that you purchase have not been in the rain or sitting in a puddle.

Rockwool is the best insulation there is.

Rockwool is an excellent product. Just imagine the pride I felt when the building inspector declared “that is one of the best insulation jobs I’ve seen”. Full credit to Rockwool. It’s a little bit more expensive and definitely takes longer to install than fiberglass, but it’s totally worth it for the far superior results.

Best to work with.

All the properties of fiberglass insulation without the itching and scratching, plus easier to cut. Now I will avoid working with fiberglass insulation like the plague.