Go Green - Energy Efficiency in Your Home

In short, R-value is the accepted way of measuring the effectiveness of insulation (resistance to heat transfer via convection and conduction). And it’s important to note that the majority of the energy lost in a home is through emission or radiant heat transfer.

E-value measures the ability to prevent heat transfer via radiant emission. And since radiant emission is by far the major factor of energy loss in your home, E-value (the ability to stop radiant heat transfer) is really more important than R-value in determining the effectiveness of your attic insulation. 

Energy Star approved Enerflex Radiant Barrier (made of metalized film) has a much higher E-value than any type of fiberglass insulation and can help reduce energy costs dramatically, especially in the hottest climates like California, Texas, Georgia and other southern states.