What is the R value of 4 inch insulation?
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Fiberglass Batt Insulation CharacteristicsThickness (inches) R-Value Cost (cents/sq. ft.) 3 1/21112-163 5/81315-203 1/2 (high density)1534-406 to 6 1/41927-345 more rows
2023-06-06 14:45:06
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Fiberglass Batt Insulation CharacteristicsThickness (inches) R-Value Cost (cents/sq. ft.) 3 1/21112-163 5/81315-203 1/2 (high density)1534-406 to 6 1/41927-345 more rows