R-Value and NC
Defined as the Resistance of thermal transference a product has.
xxxThe greater the R-Value the greater the performance of resisting thermal transference. One must note that it will save you on energy usage within your home using higher R-Value but at what price?
In NC Wake County R-value currently required by CODE for:
Click picture for Clarity
Know that what products are CODE are made in much more supply therefore at a greater reduced price. So R-Value products not used by your area’s CODE is usually quite more expensive because it is not being made in significant quantities.
The higher you go in R-Value the dimished return you will get per inch of insulation. Insulation like a lot of things also works on the principle that “Over-kill is expensive” and usually not worth the investment. Here is a chart showing the diminished returns of increasing R-Value: