Insulation question for house approximately 60 yrs old

Hello, I was wondering how often one should insulate the attic of a house that is approximately 60 years old? I believe it was insulated

20 years ago. Thank you KOS
Reply to
KOS
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If it had enough insulation installed 20 years ago, then you won't have to do it again unless some was taken out.

Reply to
Bob

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