We keep talking about this R-Value, but you may not know what it is. Here's a simple explanation:
The "R" in R-value stands for "resistance"; resistance in the movement in temperature through your walls and ceilings. When you buy insulation, you are buying "R-Value". Therefore, the higher the R-Value, the better the insulation.
With an R-Value of 5.1 per inch, USA Premium Foam provides the highest R-value in a Retrofit stud wall application. USA Insulation uses Johns Manville Formaldehyde-Free insulation products for attic installations.
Most homes in the United States are not well insulated. In fact, according to the U.S. Department of Energy, only 20 percent of the houses built before 1980 are considered well insulated. Incredibly, many homes have no insulation at all, due to the fact that building codes didn’t require insulation prior to the mid-1970’s. See below how much insulation your home should have. Contact us today for your free energy consultation.
In order to build a new home today, it is mandated, that in all parts of the country, all homes must have minimal acceptable R-Values:

These recommendations are cost-effective levels of insulation based on the best available information on local fuel and materials costs and weather conditions. Consequently, the levels may differ from current local building codes. In addition, the apparent fragmentation of the recommendations is an artifact of these data and should not be considered absolute minimum requirements.
