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What does R-value mean?

What does R-value mean?

Steve Westlake

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What does R-value mean?

R-Value is the rating system used to grade insulation products or a material’s insulating properties. The “R” is for “resistance” and refers to the resistance a material has to heat flow, or temperature conduction. When a product   or home has a high R-Value, it means that it is insulated very well.