What Is Insulation R Value
What is R-value? Tom defines R-value as the resistance of heat transfer through the insulation—meaning, the better the R-value, the less heat is lost. When it comes to R-value and recommendations for your home, a lot depends on where you live. How to Insulate HVAC Ductwork In southern parts of the United States, the recommended R-value for a roof is R-30; for the middle of the country R-38; and farther north, R-49 is strongly recommended, as the climate becomes colder....