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Internet # 205972546

Model # RXCB551525

R-23 Comfortbatt 5-1/2 in. x 15 in. x 47 in. Fire Resistant Stone Wool Insulation Batt (39.8 sqft) (12-Bags)

Covers 478 sq.ft. ($1.52 /sq.ft.)
$728.08 /pallet
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  • Maintains R-Value year after year
  • Fire Resistant & Water Repellent
  • Ease of Installation - Cuts Easily & Friction Fits
  • View More Details
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Product Details

About This Product

ROCKWOOL COMFORTBATT is a semi-rigid stone wool batt insulation for exterior wood and steel stud applications in both new construction and renovations. It features a unique flexible edge designed to compress as the batt is inserted then spring back, expanding the batt against the frame studs to give a complete fill. This flexibility ensures the expected R-value is achieved and maintained. Non-combustible and fire resistant, COMFORTBATT will not develop toxic smoke or promote flame spread, even when exposed directly to a fire. It is also offers water and moisture resistance and excellent sound absorbency. COMFORTBATT is an effective way to improve a home's energy efficiency. It is GREENGUARD Gold Certified and contributes to a healthier indoor environment.

Highlights

  • Fire resistant due to its high melting temperature of 1177°C (2150°F)
  • Stone wool provides excellent noise reduction and sound absorption to help you create quieter, more productive environments.
  • Bag coverage: 39.8 sq. ft.
  • Water and moisture resistant; does not absorb moisture to maintain insulating value
  • GreenGuard gold certified for indoor air quality
  • Made from natural rock
  • 12 bags included on a pallet
  • Click here to learn more about Eco Options and Energy Efficiency
  • Buying guide and insulation calculator:

    insulation buying guide
    Insulation calculator button
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  • Return Policy

Product Information

Internet # 205972546

Model # RXCB551525

Specifications

Dimensions

Cover Area Per Bag (sq. ft.)

39.8 sq ft

Coverage Area (sq. ft.)

478 sq ft

Product Length (ft.)

4 ft

Product Thickness (in.)

5.5 in

Product Width (in.)

47 in

Details

Bag Size

4 ft. x 16 in. x 24 in.

Batt/Roll Size

4 ft. x 5.5 in. x 47 in.

Compatible Install Surface

Wood

Faced or Unfaced

Unfaced

Insulation Features

Friction Fit

Insulation Location

2x6 Wall, Attic, Basement, Ceiling Insulation, Crawlspace, Floor

Insulation R-Value

R23

Insulation Type

Batt

Number of Pieces

96

Pack Size

12

Product Weight (lb.)

51.2 lb

Returnable

90-Day

Roll or Batt

Batt

Warranty / Certifications

Warranty Information

No

Questions & Answers

130Questions
caret
Q:Is rock wool mold resistant
by|Nov 15, 2023
1 Answer
Answer This Question

A:  ROCKWOOL is moisture resistant yet vapor permeable. Made from Basalt Rock, which is inorganic material, it provides no food source for mold to grow.

by|Nov 16, 2023
    caret
    Q:Can I put this between joists in basement ceiling after underfloor heating is installed?
    by|Nov 6, 2023
    1 Answer
    Answer This Question

    A:  Yes you can Rowena. The ROCKWOOL insulation can withstand temperatures exceeding 2000 degrees.

    by|Nov 14, 2023
      1 found this answer helpful
      caret
      Q:What is the best R-value to use in my two car garage with bedrooms up above for 2x6 construction? Thank you
      by|Oct 30, 2023
      1 Answer
      Answer This Question

      A:  R23 Comfortbatt is designed for 2x6 construction. The product will fill the joist/stud cavity and give you strong thermal performance along with some noise reduction. You are on the right track with the R-23 Comfortbatt from ROCKWOOL.

      by|Apr 12, 2024
        1 found this answer helpful
        caret
        Q:Can this be used in a furnace closet for insulation and soundproofing?
        by|Oct 27, 2023
        1 Answer
        Answer This Question

        A:  Yes it can. ROCKWOOL is resistant to heats of upwards of 2,000 degrees Fahrenheit

        by|Oct 28, 2023
          Showing 1-4 of 130

          Customer Reviews

          4.9 out of 5

          • 4.9 out of 633 reviews
          • 99% recommend this product
          Filter by:
          Showing 1-10 of 633 reviews
          Perfect For Every Project
          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 wool insulation products and have previously received products in-kind. Although compensated for my role as an ambassador, my review is based on my first-hand experience using ROCKWOOL products and on my belief in their performance and benefits to buildings and occupants. I regularly used ROCKWOOL stone wool insulation products prior to establishing an ambassador relationship with ROCKWOOL. This review reflects my own honest opinion.
          by
            • Recommended
            Very Good Product
            I installed about 650 square feet of insulation in my attic and was plesantly suprised with the ease of installation of the ROCKWOOL Comfortbatt (R-15) material. I placed Comfortbatts in between the ceil joists (full dimesional 2x4 on 16 centers). I then placed rolled R-30 Fiberglass, perpendicular to the joist direction. The Comfortbatt did not generate the dust and fibers that I found were generated with the fiberglass batt installation. The ROCKWOOL material came in easy to manage packaged bundles and when opened the material expanded very nicely. It cut easily with the bread knife as desribed. I did find inconsistencies in the cohesiveness of the Comfortbatts. Some were very cohesive and I could grab them with my hand and easily slide them into place between the ceiling joists, while other Comfortbatts would pull apart when I tried to grab the batt and slide it between the joists. Overall, I do like the general density and noise reduction of the Comfortbatts. I used the hybrid ROCKWOOL/fiberglass system to help reduce the overall cost, with the fiberglass having a higher R-value and costing about $300 less than the ROCKWOOL for the same area.
            by
              Comfort Batt
              Once I started demolition I noticed the old insulation and it was wasn’t up to standard. I used the ROCKWOOL Comfort Batt insulation to bring the kitchen up to the building code. Easy to use and the home already feels better.
              by
                Best Insulation
                I have used Rockwood in my exterior walls, interior walls, floor joists and most recently in the walls of my campervan. It is easy to work with, excellent for sound proofing, provides better fire protection and does not saturate with moisture. Best Insulation product for people who want the best Insulation with few trade offs.
                by
                  Basement rim joist insulation
                  Worked on removing and replacing the orig. fiberglass batt insulation in the basement. I chose the Rockwool Comfortbatt R15 batt since it appear to be a better product than replacing with new fiberglass batts. I think the Rockwool product was sightly more expansive, but I found it easy to work with. We'll see how good are the energy savings over time.
                  by
                    Rockwool rocks!
                    First time using Rockwool in our renovated home. As soon as we put it in the house was quieter and instantly warmer. We are now at the drywall stage and are only using two small electric portable heaters and the house is T-shirt warm! I can imagine how warm it will be once we turn the furnace on and how much money we will save in heating bills! The Rockwool Comfortbatt product is so easy to use and went up so quickly. We had one whole floor done in two days with just two of us doing the work. Will only use Rockwool from now on. We have recommended the comfortbatt and Rockwool comfort board to our daughter and husband as they will be doing a renovation to their home soon. So pleased with this company and products. Thank you!
                    by
                      Rockwool rocks!
                      First time using Rockwool in our renovated home. As soon as we put it in the house was quieter and instantly warmer. We are now at the drywall stage and are only using two small electric portable heaters and the house is T-shirt warm! I can imagine how warm it will be once we turn the furnace on and how much money we will save in heating bills! The Rockwool Comfortbatt product is so easy to use and went up so quickly. We had one whole floor done in two days with just two of us doing the work. Will only use Rockwool from now on. We have recommended the comfortbatt and Rockwool comfort board to our daughter and husband as they will be doing a renovation to their home soon. So pleased with this company and products. Thank you!
                      by
                        Great Material
                        Five star material here. Easy to cut and install, just select a good vapor barrier I chose Intello Membrane and done. I do like benefit of this material not being able to burn. And if it get wet it will dry out and will still do the job it was intended to do. And no itchy arms while installing it, perfect !
                        by
                          Great Material
                          Five star material here. Easy to cut and install, just select a good vapor barrier I chose Intello Membrane and done. I do like benefit of this material not being able to burn. And if it get wet it will dry out and will still do the job it was intended to do. And no itchy arms while installing it, perfect !
                          by
                            Easy to customize
                            Said goodbye to pink crap insulation and hello to lovely rockwool. Had major problems with squirrels in old log cabin unfinished basement ceiling. Once we cleared out the old insulation (riddled with poop and nests), we crossed our fingers that this new insulation would be inhospitable. The week after installation, they messed with one small section, which we pushed back into place with a garden hoe. I had to repeat this a few days later, but the insulation wasn’t destroyed just pushed out of place. Since then, no issues (about 2 months as of this writing). There are many wires and pipes (for geothermal heating) in that basement ceiling, so installation went slowly in some sections. But the stuff cuts so easily that it’s not hard to customize. Just always “measure twice, cut once” as my father used to say. I’m not a contractor, not even close. Just a homeowner capable of the most basic home maintenence. I found rockwool comfortbatt easy to work with and was very proud that we could do this ourselves!
                            by
                              Showing 1-10 of 633 reviews