Among the listed insulation materials, which is highest density and offers high R-value per inch?

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Multiple Choice

Among the listed insulation materials, which is highest density and offers high R-value per inch?

Explanation:
R-value per inch shows how much resistance to heat you get for each inch of material, so a denser material that still traps air well can deliver a higher performance per thickness. Mineral wool fits this well because it’s denser than the other options and its mineral fiber structure traps air efficiently, giving a higher R-value per inch than glass fiber, cellulose, or cotton. It also stands up to higher temperatures and is noncombustible, adding practical benefits. So among these choices, mineral wool provides the highest density and the best R-value per inch.

R-value per inch shows how much resistance to heat you get for each inch of material, so a denser material that still traps air well can deliver a higher performance per thickness. Mineral wool fits this well because it’s denser than the other options and its mineral fiber structure traps air efficiently, giving a higher R-value per inch than glass fiber, cellulose, or cotton. It also stands up to higher temperatures and is noncombustible, adding practical benefits. So among these choices, mineral wool provides the highest density and the best R-value per inch.

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