Keep the outside...outside with ROXUL COMFORTBATT® Thermal Home Insulation.

ROXULCOMFORTBATT® Thermal Home Insulation keeps your home warm in the winter and cool in the summer for more comfortable living all year 'round. Installing ROXUL also helps you save money year after year by reducing the costs of your heating and air conditioning. And a house that uses less energy is a house that’s easier on the environment.

What is R-value?

R-value is the measurement of an insulation's ability to prevent heat flow. The higher the R-value, the more insulating power it provides. ROXULCOMFORTBATT® delivers top performance for all thermal applications around the home. It is available in the following sizes:

  • 3½" thick batts with R-value ratings of R14 and R15 (US only) for use in 2 x 4 exterior wall applications.
  • 5½" thick batts with R-value ratings of R22 and R23 (US only) for insulating attics and 2 x 6 framed exterior walls.
  • 7¼" thick batts with R-value rating of R28 and R30 (US only) for insulating attics and 2 x 8 framed exterior walls.

Equally important, the R-value of ROXUL insulation is not affected by water. ROXULCOMFORTBATT® does not store or transfer moisture, and it's completely resistant to mold, mildew, rot and bacterial growth. 


Energy savings begin with a properly insulated attic and exterior walls. But  there are other applications that can make a big difference in your home's comfort. Insulating the exposed concrete walls in your basement and heated crawl spaces are effective ways to improve the energy efficiency of your home. ROXUL insulation is easy to cut and install. Its unique stone wool composition, density, and friction-fit batts help you or your contractor prevent any gaps that can result in energy loss. 

A critical step when installing thermal insulation is the proper use of vapor barriers/retarders. Many building experts and professional contractors recommend polyethylene as the best choice. You should always consult your local building codes when you're doing the work yourself. More information on vapor barriers is available here. 

Applications for
Applications for

Time, Money and Energy Savings, by ROXUL® COMFORTBATT ®

Save time and moneyon residential building or renovation projects with ROXUL COMFORTBATT ®’s simple installation and effortless energy savings. read more

Fire resistant, water repellent, and sustainable, ROXUL’s COMFORTBATT ® mineral wool insulation is synonymous with thermal efficiency and comfortable year ’round living.

The Right Fit with ROXUL

The right fit is crucial for attaining and maintaining maximum stated insulation R value.  High density ROXUL COMFORTBATT ®can be quickly and accurately cut to fit wall cavities, around pipes, wires and non-standard areas. Since ROXUL is made from stone, a simple serrated bread knife is recommended for easy precision cuts and v-notches, no utility blades or specialty insulation materials required.Simply insert,compress and release the batt for lasting thermal performance.

When cutting COMFORTBATT®, allow for an extra half inch to an inch of product in order to achievea complete fill, maximizing R value and optimizingthermal effectiveness.

Specifically engineered for use in attics, cathedral ceilings, exterior walls above grade, basement walls, exposed floors and heated crawl spaces, ROXUL COMFORTBATT ®is available in a variety of sizes and R values. Verify your local building codes in order to find the version best suited for your home.

Explore options and expert tips at ROXUL Do-It-Yourself:

Water Resistance for a Constant R value

Water resistant mineral wool insulation from ROXUL haswhat it takes to maintain its shape and effectiveness over time. In the event of wetting, ROXUL COMFORTBATT®will dry out and maintain its R-value due to its vapor permeable properties.

Breathe Easy with ROXUL ® COMFORTBATT ®

Water repellent, inorganic mineral wool insulation will not rot or promote the growth of harmful mold, mildew or bacteria that are detrimental to both health and thermal performance. ROXUL is non-combustible and naturally fire resistant, without the addition of hazardous chemical flame retardants.

ROXUL processes and products are CFC and HCFC free.