Required R-values vary by region and climate ... The fibers are then woven into batts, about the same size as fiberglass batt insulation but denser. Mineral wool also repels water so mold can’t grow ...

This fiberglass batt insulation is ideal for sound control ... In colder areas, higher R-values are better.' The R-value is a measure of thermal resistance. The higher the R-value, the more ...