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Building Pumice Stone Crusher Owners

Jun 25 2010 Crushing pumice destroys air bubbles thus decreasing insulation value. Use cavity wall construction Outside wall -- Interior Filled with Pumice -- Inside Wall. Pumice insulation should be about 2 feet 24 inches thick to give R-40 insulation value in cold climates design house with thick walls because pumice is not a high R-value insulation.

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