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Simple Massless Conductance Heat Capacity Density RValue <br /> No Name Construct Construct [Btu/h.sf.F] [Btu/sf.F] [lb/cfJ [h.sf.FBtu] <br /> 1046 Shingle+Vented Attic+6" Insulation+ No No <br /> 0.05 1.40 10.89 21.5 ❑ <br /> GWB or ACT <br /> Layer Material Material Thickness Framing <br /> Na [ft] Factor <br /> 1 1011 ASPHALT-SHINGLE AND SIDING 0.000 � <br /> 2 1007 PLYWOOD, 1/2IN 0.0417 0.000 � <br /> 3 1030 6 in.Insulation 0.5000 0.000 � <br /> 4 1015 GYP OR PLAS BOARD,1/2IN 0.0417 0.000 � <br /> 8/8/2007 <br /> EnergyGauge Summit v3.10 � <br />