How much insulation should a Long Island attic have?
Answers from the sources
Patchogue Heating and Air Conditioning
“Suffolk County sits in climate zone 4, and the Department of Energy recommends R-38 to R-60 for attics here. In blown fiberglass that is roughly 13 to 20 inches of settled depth, and in cellulose roughly 10 to 16 inches.”
Sourcewww.patchogue.ac
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