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winter_rainbow t1_j65a7e0 wrote

You can find insulation that is 24” wide. It’s commonly used. Using 3-1/2” thick insulation will be fine. Compressing the insulation makes it lose a little bit of R-Value, but not much.

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jinbtown t1_j66qowp wrote

it increases R value per inch, but loses inches. The R value actually goes up when compressing fiberglass.

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