Thermal transmission coefficients (lambda) of industrial insulating materials: wood or rock wool, expanded or extruded polystyrene, Polyurethane, Phenolic, etc.)
This article is part of a general article on the heat transfer coefficients
Lambda given in W / mK
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Rockwool class RA1 0.017
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Rockwool class RA2 0.041
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Rockwool class RA3 0.038
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Rockwool class RB3 0.039
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Rockwool class RB4 0.041
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class glass wool VA1 0.047
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class glass wool VA2 0.042
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class glass wool VA3 0.039
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class glass wool VA4 0.037
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class glass wool VA5 0.034
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class glass wool VB1 0.051
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class glass wool VB2 0.045
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class glass wool VB3 0.041
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class glass wool VB4 0.038
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class glass wool VB5 0.035
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class glass wool VC1 0.056
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class glass wool VC2 0.049
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class glass wool VC3 0.044
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class glass wool VC4 0.040
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class glass wool VC5 0.036
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class glass wool VD1 0.050
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class glass wool VD2 0.048
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class glass wool VD3 0.043
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class glass wool VE1 0.037
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class glass wool VE2 0.039
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Polyurethane foam plate with Plasterboard or wood derivatives 0.035
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polyurethane foam between glass or metal plates 0.035
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rigid phenolic foam 0.035
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polyvinyl chloride rigid foam Q2 0.031
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polyvinyl chloride rigid foam Q3 0.034
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extruded polystyrene Styrodur 0.032
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EPS ref. AM 0.058
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EPS ref. BM or CM 0.047
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EPS ref. Or CC 0.043
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EPS ref. DM or DC 0.041
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EPS ref. EM or EC 0.039
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EPS ref. FM or FC 0.037
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EPS ref. GM or GC 0.036