What is R-Value?
R-value is the measurement for a material’s ability to resist the flow of heat. As a general rule: the higher the R-Value, the greater the insulating power.
How much insulation is enough?
The amount of insulation recommended for your home depends on where you live. Your builder will know the guidelines for your region. Here is a list of energy codes broken down by state.
Are there factors to consider in insulation beyond R-value?
R-value is very important, but it's not enough. To have a comfortable, energy efficient and durable house, you have to think about air leakage, moisture infiltration and proper installation.