ROCKWOOL Comfortbatt R23 is a stone wool batt insulation rated R-23, aimed at exterior walls, attics, basements and heated crawl spaces. Its dense, friction-fit batts press into stud and joist bays without fasteners, and stone wool resists moisture, mold and fire better than fiberglass. It cuts cleanly with a serrated blade and holds its shape over time. Against fiberglass batts of similar R-value, it costs more and weighs more, but installers say it fits tighter, deadens sound and does not sag.
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Owners rate it highly for fit, density and ease of installation. Most praise how firmly the batts stay in place and how much quieter rooms feel. The main complaints are the higher cost and the dust and fibers when cutting.
Rockwool Comfortbatt R23 is stonewool batt insulation for the home. It helps keep a house warmer in winter and cooler in summer, which can reduce heating and cooling costs. It has an R-value of 23 and is 3.5 inches thick.
The batts are made of stone wool and are non-combustible. They are moisture resistant, which helps prevent mold growth, and they absorb sound. The batts are easy to cut and install. Their density and friction fit help the batts sit snugly between studs and joists and prevent gaps that cause energy loss.
Use them in attics, exterior walls, interior walls, ceilings and floors. They also work on exposed concrete basement walls and in heated crawl spaces.
