...from warmer to cooler areas. The effectiveness of thermal insulation is measured by its R-value, its ability to resist heat flow. The higher the R-value, the greater the insulation's resistance to heat flow. Unfortunately, consumers cannot easily evaluate insulation performance,...

...result, less fuel is used for heating in winter and there is a reduced need for mechanical cooling during the summer. Adequate insulation may also permit...typically R-1 1 ; a 6 inch-thick batt is typically R-1 9; and so on. Most importantly, be sure to remember that the higher the R-value the better (eg,...

...measured or rated in terms of its thermal resistance, or R-value. An R-value indicates insulations ability to resist heat flow; the higher the R-value, the greater the insulating effectiveness. R-values depend on the type of insulation, its thickness, and its density....