The first step in determining the insulating capabilities of a cabin is determining how well the walls will conduct heat. This is done by determining the R-value (thermal resistance) of the wall and subsequently determining the U-Value or heat transfer coefficient. Each portion of the wall has different insulating capabilities, therefore, the thermal resistance must be determined for each section of the wall individually.
1.) Find R for each air film and the log individually
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2.) Add the R Values together,
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Rair1+Rlog+Rair2=Rtotal
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3.) Find U (heat transfer coefficient)
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