Northern Thermal Comfort
715.356.6364
2379 Rux Rd.
Arbor Vitae, WI 54568

What is R-value?

R-value is a measurement of conductive thermal resistance. It is also the mathematical inverse of U- Factor (1 / R-value = U-Factor). It can have a value of 1 – infinity (theoretically). Higher is better. All matter has an R-value. That doesn't mean that all matter is a good insulator. Rock has an R- Value of 1 per foot and therefore not a good insulator.


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