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by fouc
1618 days ago
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It seems like historically people underestimated the insulation value of polyurethane because apparently it doesn't necessarily do well on the conventional R-value score. Apparently a solid inch of sprayed polyurethane can provide 90% insulation, and 2 inches gets you to 99% insulation. https://www.monolithic.org/blogs/presidents-sphere/r-value-f... |
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