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Rockwool Safe'n'Sound is stone wool batt insulation sold in 3-inch-thick, 16-inch-wide, 48-inch-long pieces covering 65 square feet. It is made for sound control in interior walls and ceilings, and it also resists fire, moisture and mold. The batts are unfaced and cut with a serrated knife, then friction-fit between studs. At $83.98 at Home Depot as of November 7, 2026, it sits at the low end of its recent price range.
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Lowest price we've seen: $65.00 on Nov 7 at Years Building Materials. Tracked across 4 stores since Nov 7.
Owners rate it highly, mostly for how much it quiets rooms and how easy the batts are to cut and fit. Complaints center on itchiness during installation and the higher price than fiberglass.

