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Wool1-2 of 2 Articles, Hints & Tips- Sheep wool insulation has an R-value of approximately 3.5 to 3.8 per inch of material thickness 0.3 to 0.6 points higher than fiberglass, cellulose, or mineral wool.
- From The Healthy House Answer Book: Answers to the 133 most commonly asked questions. Questions 127-133.
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