Quote:
Originally Posted by MindBomber
Paper back batt insulation was the standard method of insulating an attic space up until the late eighties; blown in cellulose and asbestos were also used, but they are and were more expensive to install and therefore are not as common. The original batt insulation found in homes ranges is most often R-20, that is half the current minimum code requirement of R-40 and most homeowners choose to move to R-50 when upgrading with blown cellulose or fiberglass.
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Thanks. It's per code for that age of house I guess.
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