Understanding R-Value
R-Value reflects how insulated your home is, do you understand it?
Insulation is rated by its R-value, which measures its thermal resistance or how well it holds back heat. The higher the R-value, the better. Bare concrete walls are about R-1, while attic insulation in newly-built Midwestern homes usually measures about R-44.
R-value is proportional to the insulation's thickness, but it also depends on the type of material and its density. The more air pockets an insulating product has, the higher the R-value. For example, R-38 attic insulation may be 12 inches of fiberglass batts, 10 inches of rock wool loose-fill or seven inches of expanding foam.
To read more from this article about R-value and for some more examples, please visit http://powerhousetv.com/Energy-EfficientLiving/Insulating/026759.
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