Definition of rock wool in English:

Share this entry

rock wool

Pronunciation: /ˈräk ˌwo͝ol/


Inorganic material made into matted fiber used especially for insulation or soundproofing.
Example sentences
  • You can compensate for this stacking effect and achieve the desired total R-value by adding about one extra inch of insulation if the old insulation is fiber glass, or about ½ inch if the old insulation is rock wool or cellulose.
  • Pipes for kitchen stoves, wood stoves, and furnaces should only be insulated with fiberglass or rock wool because cellulose may smolder if flue temperatures become hot enough.
  • Pack gaps around an insulated chimney with unfaced rock wool or unfaced fiber glass insulation.
Share this entry

What do you find interesting about this word or phrase?

Comments that don't adhere to our Community Guidelines may be moderated or removed.