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 )

Superior Product

This product is superior and easy to cut to fit any area you may have.

great product

We replaced our insulation in our attic that was in there since 1962 with the Rockwool and it made a huge difference in our home.

Great insulation

Love this stuff. Cuts with a bread knife no need to buy a special knife. Can feel the difference in the rooms I put it in. Lots of other great qualities like repels water if wet, repels rodents - won’t make nests in it, and won’t catch in fire. Will buy more.

Inconsistent quality. Contains rat feces

I've bought about $4000 of this stuff and it's hit or miss when I buy the stuff. Some of it is wet like it sat out in the rain, then it has a urine smell to it when it's wet. It's supposed to be water resistant, but it soaks it up like a sponge and doesn't dry out. Then some of it looks like it contains rat feces.

Great product and less itchy

I used this product to insulate the ceiling of my garage. At time water can get in from the roof fan vent so I needed something completely water resistance. Noticed that the rock wool was also a lot thicker and less prone to collapsing then traditional fiber glass insulation. I double layered it for r60 and my garage is easily 20 to 30 degrees hotter or colder then the outside air. Perfect for what I’m storing and for using my garage space to workout in.

easy up

I have installed 8 bags so far in the floor of my camp, product installs very easy. There were approx. 1-2 peices per bag that lacked rigidity to hold it in the bays, what I mean is each peice has a rigid side and a soft side these peices were both soft sides. Quality control should be payed more attention

Acceptable price and good for DIY

Excellent material, non itching, easy to cut and leicht weight. Installed between rafter without the need of supporting wire.

Fantastic Insulation

Rockwool is fantastic! Just put up 35 bundles in the attic crawlspace. Half over blown-in insulation and the other half is double layer for R60. R60 is over the remodeled areas. Even the Rockwool over blown-in is very quiet. R15 on the walls make it very quiet in the new section. Had to readjust air flow from the furnace to reduce it to the 2nd floor because it was getting too warm and also lowered the temp setting. We will see how it performs in January & February when Temps can get into the si...

Great product!

ROCKWOOL COMFORTBATT R-30 30.7-sq ft Unfaced Stone Wool Batt Insulation- I highly prefer this over pink fiberglass. Rockwool is much easier to use and it's dense composition does not result in the compression problems inherent with pink fiberglass. Works more effectively as a thermal bridge, also.

Always use Rockwool

I have used this in every new build I have done. There are so many positives to using mineral wool to other insulation products. Rockwool brand is the best product on the market

Roxul Batt Insulation

I've installed WAY too much fiberglass batt in my life! Roxul is the BEST! High R-val (R-15 in a 2x4 wall). Easy to cut w/ bread knife; allows accurate cutting. Minimal masking required, minimal (if any) itch. Nice fit in standard frame cavities.

Great insulation

Installed in a house build in 1929, the old pink stuff was falling from the roof and was only R-11. I had to build out rafters with 2 by 3s for extra depth. Rockwool was easy to install, easy to handle, does not itch, and has 30 R-value. This is not a project I plan on doing a second time, so spending a few extra dollars for quality is well worth it.

ROCKWOOL COMFORTBATT R-30 Stone Wool Batt Insulati

I have always used fiberglass insulation in my homes. I purchased a new home where the attic insulation was only about R-21 at best and for the cold winters of the Pennsylvania mountains that just does not do it! The home was always slightly chilly and the heat pump would be going most if not all of the night on a 20F nights! I have read about and was interested in trying the ROCKWOOL for my attic space. They stated R-30, fire resistant up to 2150 f as well as sound reducing which is good, becau...

No Itch DIY

Easy material to work with, no itch. It is a messy material though, much of it breaks apart.

Terrible website- is ComftBatt product any better?

Read many positive reviews about RW ComfortBatt insulation; so went to a lumber yard and bought some to try on an exterior wall wood studs insulation project. Foolish me, expecting a company in 2019, to have an easy to navigate website with some basic installation information. “Search here...” OK...let’s try: ‘Installing ComfortBatt’.... “Residential .... SellSheet” (nope). “Ratings....”(nope). “CavityRock....” (nope). “ComfortBatt ...Guidespec” (nope). “Commercial CavityRock (n...

Easy to work with. Holds up better.

No itchy aftermath to speak of. But best of all you get better insulating against San Joaquin valley heat and mountain cold from snow. We are west facing in the Sierras. 100 to 15 degrees. Excellent product!!!

The best product!

I have replaced all of the old 1955 insulation in my home and i am working on the last room right now.I'm using R14 for 2 x 4 application inside my walls.I am so glad that i'm using Roxul as it has already shown to lower my heating bills and the accoustics changed right away.I don't hear much noise outside anymore.It is so easy to install and it's not itchy,i'm cutting the pieces with a bread knife.Thanks guys for a great product!

Great product so far

Doing a new build. The order came quick and much cheaper than any alternative. Looking forward to working with this product