Richard L.Verified
Still itches but this is my first time. Cuts like butter with an insulation knife. Nowhere near as bad as fiberglass and I even have enough left over to add to my next project. I can't wait.
Core Insulation Supply ReviewsSee store reviews
ROCKWOOL RXCB551525 COMFORTBATT R23 5.5 In. X 15.25 In. X 47 In (39.82 SQFT)
+1Jason V.Verified
My order took a bit longer than I expected. I ordered Jan 12 and received February 17, most of that was delay was from weather delays. The product itself installs incredibly easy and is great to work with.
ROCKWOOL RXCB5523 COMFORTBATT R23 5.5 in. X 23 in. X 47 in (37.53 SQFT)
+1Daren S.Verified
Outstanding service. Their representatives were with me the whole time. They helped with an order error that they caught, kept me posted on deliver status by phone, text & email, work with the shipper for a tight delivery window; all was perfect. I couldn't ask for more. Strong recommendation.
ROCKWOOL COMFORTBOARD 80 1-1/4 in. X 48 in. X 96 in. (32 SQFT)
Jonathan P.Verified
Ordered 12/1/25, shipped 12/12/25, delivery (Portland, OR) 12/26/25 then delayed (at my request) to 12/29/25.
12xR23 and 15xR38 batts. I haven't installed yet but have worked with before so know what I'm getting into (the R38 should be... fun?).
11 days with no email between order confirmation and shipping. Once delivered, no sign of free knives. Still the price was about 10% cheaper than Lowes shipped with full selection available. Estes shipping subbed out the last mile and I was able to hel...
ROCKWOOL RXCB3823 COMFORTBATT R38 9.50 in. X 23 in. X 47 in (22.5 SQFT)
Friedrich E.Verified
Shipping took a little bit due to holidays, but Rockwool arrived on lift gate truck and quality expectations are met.
ROCKWOOL RXCB381525 COMFORTBATT R38 9.5 in. X 15-1/4 in. X 47 in. (19.9 SQFT)
Slimane A.Verified
The price was unbeatable, the communication was flawless, and the cross country delivery was almost on time (order was fulfilled during the holidays). This is a reliable company.
ROCKWOOL RXCB5523 COMFORTBATT R23 5.5 in. X 23 in. X 47 in (37.53 SQFT)
Leonard Z.Verified
The Pallet of Rockwool 6” sound and safe was shipped without any problems or issues. I finished installing the entire pallet load last weekend in my basement and what a huge and great difference it made with the sound under ceiling! Now you don’t hear footsteps from upstairs or conversations. Thank you.
ROCKWOOL SAFE ’N’ SOUND 6 in. X 15-1/4 in. X 47 in. (29.9 SQFT)
Myron B.Verified
Was not in stock when I ordered. However it was communicated after the fact that there would be a delay which was nice. Driver called when he got to my house and I was 10 minutes away. I asked him to wait because we could load it straight from his truck to my tall box truck. When I got there he had already unloaded it in the middle of my driveway so I needed to call for extra help. It was a total shit show. Made the whole delivery an hour longer than it had to be. At least he was nice enough to ...
ROCKWOOL RXCB3823 COMFORTBATT R38 9.50 in. X 23 in. X 47 in (22.5 SQFT)
Chris W.Verified
Great product and price; shipping and customer support was terrible. it took almost three weeks to receive an order, which I payed for to have in 4-10 days. Not everything was delivered when the order was finally received, and customer service just bounced me around when I got a hold of a person.
ROCKWOOL RXCB381525 COMFORTBATT R38 9.5 in. X 15-1/4 in. X 47 in. (19.9 SQFT)
Patricia M.Verified
I’m still in the middle of a project as another project popped up. So it arrived as scheduled, well sealed but past taking it inside the house, the project has’t begun yet so can’t give a product review yet as I haven’t tried it yet. But you keep sending these dogged request for a review so here you go.
ROCKWOOL RXSS61525 SAFE ’N’ SOUND 6 in. X 15-1/4 in. X 47 in. (29.9 SQFT)
Jeffery L.Verified
Great dealer overall. I placed the order during a holiday, so there were a few small delays, but communication was smooth and efficient. They offer nationwide shipping at a very good price！
Grip-Rite Stone Wool Insulation Knife
+2Joshua U.Verified
I was sent the wrong product! I tried to call and email but I never got a reply back! Im in a tight deadline so I had to make it work. Horrible customer service!
ROCKWOOL® RXSS31525 SAFE ’N’ SOUND 3 In. X 15.25 In. X 47 In. (59.73 SQFT)
Tim W.Verified
Great product
ROCKWOOL COMFORTBATT R15 3.5 in. X 23 in. X 47 in. (60.06 SQFT)
Jaroslaw M.Verified
Quick and professional service.
ROCKWOOL RXCB3023 COMFORT BATT R30 7-1/4 in. X 23 in. X 47 in (30.03 SQFT)
+2Ralph R.Verified
Working out so far just don’t know why it took so long to get it.? But we’re happy.
ROCKWOOL RXCB3523 COMFORTBATT R15 3.5 in. X 23 in. X 47 in. (60.06 SQFT)
+3Steve T.Verified
Easy to install. Easy to cut and size properly.
ROCKWOOL RXSS323 SAFE ’N’ SOUND 3 in. X 23 in. X 47 in. (60.05 SQFT)
+4Christopher H.Verified
The insulation took longer to arrive than originally anticipated and it was damaged when it arrived. We decided to accept it because of the delay and the urgency of our project deadline, but we would have rejected it if we weren't under such a time crunch due to the delay.
ROCKWOOL RXCB12548 COMFORTBOARD 80 1-1/4 in. X 48 in. X 96 in. (32 SQFT)
Jacob K.Verified
Took a little while to get to me, but everything arrived and in good condition. Very excited. I am a big fan of this insulation.
ROCKWOOL RXCB301525 COMFORTBATT R30 7-1/4 in. x 15-1/4 in. x 47 in. (29.86 SQFT)
Edwin L.Verified
Great experience
ROCKWOOL RXCB381525 COMFORTBATT R38 9.5 in. X 15-1/4 in. X 47 in. (19.9 SQFT)
Juliann H.Verified
The team at Core Insulation is very easy to work with. The Rock wool insulation is fantastic. I plan to order more for the remainder of our project
ROCKWOOL COMFORTBATT® R30 7-1/4 in. x 15-1/4 in. x 47 in. (29.86 SQFT)
Dave P.Verified
Excellent product, easy to use at a very good price The delivery driver was nice and very professional. Very happy with the results .
ROCKWOOL® RXCB381525 COMFORTBATT R38 9.5 in. X 15-1/4 in. X 47 in. (19.9 SQFT)
+1David H.Verified
It's fairly easy to work with, hopefully holds well and saves us some money
ROCKWOOL RXCB5523 COMFORTBATT R23 5.5 in. X 23 in. X 47 in (37.53 SQFT)
Rick S.Verified
I love product. I did not love late delivery. You advertise super fast. As soon as I purchase you send me a email explaining your supplier always shorts you.
ROCKWOOL RXCB5523 COMFORTBATT R23 5.5 in. X 23 in. X 47 in (37.53 SQFT)
Kevin U.Verified
Product was exactly what I ordered and at a very fair price. Delivery made this experience so easy and my driver Jamal was amazing!
ROCKWOOL RXCB3023 COMFORT BATT R30 7-1/4 in. X 23 in. X 47 in (30.03 SQFT)
Ethan M.
I used ROCKWOOL Safe’n’Sound for our basement ceiling, and the sound reduction was incredible. It was easy to cut and install, and knowing it’s fire-resistant gives us peace of mind.
ROCKWOOL SAFE ’N’ SOUND 6 in. X 15-1/4 in. X 47 in. (29.9 SQFT)
Sarah L.
I appreciate the moisture resistance of Comfortbatt, especially in my basement walls. The product was easy to handle and cut, making installation quick. My home stays warmer, and the quality is clear.
ROCKWOOL COMFORTBATT R30 7-1/4 in. X 15-1/4 in. X 47 in. (29.86 SQFT)
Emily R.
I installed this stone wool batt in my attic. It was easy to work with and provided immediate thermal improvements. The product also helps reduce noise from outside, which was a bonus.
ROCKWOOL COMFORTBATT R30 7-1/4 in. X 15-1/4 in. X 47 in. (29.86 SQFT)
Robert K.
This insulation was easy to cut and install in both wood and steel framing. The thermal performance is impressive, and I appreciate that it also helps with sound dampening. Highly recommend for any exterior wall cavity.
ROCKWOOL COMFORTBATT R30 7-1/4 in. X 15-1/4 in. X 47 in. (29.86 SQFT)
Ezra C.
Rockwool insulation feels sturdy and high-quality thanks to its volcanic rock base. It also helps with noise reduction, which is a big plus in our busy neighborhood. I appreciate the sustainable use of recycled materials.
ROCKWOOL COMFORTBATT R23 5.5 in. X 23 in. X 47 in (37.53 SQFT)
Jason H.
The non-directional fiber structure fills all gaps and crevices, reducing drafts and energy loss. I’m really pleased with how it performs and the fire resistance is an added bonus.
ROCKWOOL COMFORT BATT R13 3.5 in. X 15-1/4 in. X 47 in. (60.06 SQFT)
Karen J.
Comfortbatt was recommended by my contractor, and it didn’t disappoint. It’s fire-resistant and performs well in both exterior walls and floors. The quality material feels like it will last for decades.
ROCKWOOL COMFORTBATT R30 7-1/4 in. X 15-1/4 in. X 47 in. (29.86 SQFT)
Mark V.
ComfortBatt is my go-to for all new builds. The high-density stone wool provides superior thermal performance, and the flexible edge really helps with installation precision. Clients are always happy.
ROCKWOOL COMFORT BATT R13 3.5 in. X 15-1/4 in. X 47 in. (60.06 SQFT)
Jason P.
I installed ROCKWOOL Comfortbatt in my home renovation project. It is dense and fits snugly without gaps. The thermal resistance is excellent, and the non-combustible nature adds safety benefits.
ROCKWOOL COMFORTBATT R30 7-1/4 in. X 15-1/4 in. X 47 in. (29.86 SQFT)
Sarah W.
We used ROCKWOOL ComfortBatt during our recent remodel. The installation was straightforward, and it fits snugly around studs without gaps. Our energy bills have noticeably decreased, and the fire resistance is a huge plus.
ROCKWOOL COMFORT BATT R13 3.5 in. X 15-1/4 in. X 47 in. (60.06 SQFT)
Matthew R.
I like that Rockwool uses volcanic basalt rock, making it natural and durable. The recycled slag fiber content makes it sustainable and robust. Overall, great insulation for thermal and acoustic control.
ROCKWOOL COMFORTBATT R23 5.5 in. X 23 in. X 47 in (37.53 SQFT)
Nathan N.
The unique mineral fiber structure of Rockwool really helps block sound and insulate against temperature changes. Knowing it’s made from natural basalt and recycled slag makes me feel better about my choice.
ROCKWOOL COMFORTBATT R23 5.5 in. X 23 in. X 47 in (37.53 SQFT)
Miles T.
I installed Rockwool insulation last year and love the results. It’s easy to cut and fit around studs, and it doesn’t lose its insulating power over time thanks to its mineral fiber makeup.
ROCKWOOL COMFORTBATT R23 5.5 in. X 23 in. X 47 in (37.53 SQFT)
Charles S.
Rockwool’s mineral fiber composition really makes a difference in soundproofing my home. The basalt and slag fibers create a dense insulation layer, which also helps save on heating and cooling costs.
ROCKWOOL COMFORTBATT R23 5.5 in. X 23 in. X 47 in (37.53 SQFT)
Asher V.
This insulation really stands out with its mineral fiber construction. The basalt and recycled slag blend provides superior fire resistance and thermal performance. It's a solid investment for anyone serious about home comfort.
ROCKWOOL COMFORTBATT R23 5.5 in. X 23 in. X 47 in (37.53 SQFT)
Jaxon Q.
I chose Rockwool insulation because of its durable stone fiber makeup. The combination of basalt and slag fibers creates excellent thermal and sound insulation. My energy bills have noticeably decreased since installation.
ROCKWOOL COMFORTBATT R23 5.5 in. X 23 in. X 47 in (37.53 SQFT)
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