Results of a series of comparative performance tests done under various simulated weather conditions to measure HEAT LOSS through 10 1/2' x 9' wall specimens with insulation installed to each respective manufacturer specifications:

IMPORTANT:  Heat transfer is measured in BTU's. BTU's lost to the outside of a wall in winter is HEAT LOSS and must be constantly replaced by your furnace to keep you comfortable. You buy this heat loss replacement from your local power company and have no control over the price. Obviously, LESS HEAT LOSS IS BETTER.

REMEMBER:  The lower the HEAT LOSS (i.e. BTU's / Hour) the better performance the insulation is providing. Each 100 BTU/Hour increase in Heat Loss can mean an increase of $23.00 per month for electric heat in a 1500 square foot house, with electricity costing 7 cents/kwh. (Electricity costs in the US range from 4-14 cents/kwh.)

READ THIS BEFORE YOU BUY:  All insulations do not perform the same under all conditions. Some insulations are affected adversely by cold, wind and moisture. The insulation that keeps HEAT LOSS to a minimum in all conditions is the best, regardless of R-Value (i.e. CORBOND^®). You don't pay your heating and cooling bills in R-Values.