- Q.Are sound-control batts any
different from regular fiberglass batts?
A.Architect Jerry Germer
responds: There is little if any difference
between fiberglass sound-control batts and unfaced
fiberglass thermal batts. Owens Corning’s
published R-values for their 3 1/2-inch-thick
thermal batt insulation and their sound attenuation
batts are identical at R-11. An Owens Corning
representative says that the two products are
tagged differently mainly for marketing purposes.
CertainTeed’s 3 1/2-inch sound-control
batts also come in at R-11. According to a
representative of Schuller International, their
sound-control batts are slightly less dense than
their thermal-control batts. While their 3 1/2-inch
sound-control batts achieve R-11, their thermal
batts in the same thickness are rated at R-13 and
In most cases, sound-control batts are priced
the same as comparable thermal batts. But if you
can find thermal batts at a lower price than
sound-control batts, there is no reason not to use
them for sound control.