Thermal transmission coefficients (lambda) of natural stones
This article is part of a general article on the heat transfer coefficients
Lambda given in W / mK
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Andesite 1.1
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2.2 Slate
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Basalt 1.6
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Gneiss 3.5
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Granite 2.8
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Sandstone (silica) 2.3
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Calciferous sandstone 1.9
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Quartz sandstone 2.6
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0.55 washing
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3.5 Marble
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Meulière 1.8
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Hard stone 1.7
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1.4 firm stone
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Soft stone 1.1
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Very hard stone 2.3
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Very soft stone 0.85
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0.12 pumice stone
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Porphyry 3.5
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2.2 shale
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Flint 2.6
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Trachyte 1.1