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Definition of rock wool in English: rock woolnoun mass nountrademark in UK Inorganic material made into matted fibre used especially for insulation or soundproofing. Example sentencesExamples - Loose-fill insulation, usually made of fiber glass, rock wool or cellulose, is blown into the attic or walls.
- The European company produces a mineral wool insulation containing equal amounts of rock wool and slag wool.
- Pack gaps around an insulated chimney with unfaced rock wool or unfaced fiber glass insulation.
- 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.
- 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.
Definition of rock wool in US English: rock woolnounˈräk ˌwo͝ol trademark in UK Inorganic material made into matted fiber used especially for insulation or soundproofing. Example sentencesExamples - Loose-fill insulation, usually made of fiber glass, rock wool or cellulose, is blown into the attic or walls.
- Pack gaps around an insulated chimney with unfaced rock wool or unfaced fiber glass insulation.
- 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.
- 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.
- The European company produces a mineral wool insulation containing equal amounts of rock wool and slag wool.
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