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    Talathian's Avatar
    Talathian Posts: 9, Reputation: 1
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    #1

    Aug 13, 2012, 05:56 PM
    Insulation help
    Ok I need some one to help answer a question.

    I have a friend that is telling me if I put 2 X 2 over plaster and lath and then put regular bat insulation between them and then drywall over that it will work perfectly and will not lose any R value by smashing it into a 1 1/2 " area as opposed to a 3 1/2" area.

    He stated he did that and it worked perfect. He did it as a poormans remodel.

    Which is true? Do you lose R Value if you smash it in a smaller area or does it keep the same R value?
    ma0641's Avatar
    ma0641 Posts: 15,675, Reputation: 1012
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    #2

    Aug 13, 2012, 07:47 PM
    Your friend is wrong. Air is the insulating factor and by compressing the fiberglass you lose R value.
    Talathian's Avatar
    Talathian Posts: 9, Reputation: 1
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    #3

    Aug 13, 2012, 07:51 PM
    Quote Originally Posted by ma0641 View Post
    Your friend is wrong. Air is the insulating factor and by compressing the fiberglass you lose R value.
    Thank you. That is what I told him but he said otherwise. Now I have proof.
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