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  1. #1
    mathew stouffer's Avatar
    mathew stouffer Guest

    Default Fiberglass insulation in attic

    Typically with newer construction I don't see fiberglass bat insulation in the attic. What are your thoughts on this. Furthermore, is the rating valve R-3 per inch of fiberglass?

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  2. #2
    Michael Garrity's Avatar
    Michael Garrity Guest

    Default Re: Fiberglass insulation in attic

    Do you mean R -30? Fiberglass batts used all over up here.

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  3. #3
    Join Date
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    Default Re: Fiberglass insulation in attic

    Quote Originally Posted by mathew stouffer View Post
    Typically with newer construction I don't see fiberglass bat insulation in the attic. What are your thoughts on this. Furthermore, is the rating valve R-3 per inch of fiberglass?

    Fiberglass batt insulation is approximately R-3 per inch - provided ... that it is installed properly, cut to fit, not squished in sideway or in thickness, by anything, which includes NM cables, gas lines, etc.

    That insulation in your photos does not appear as though it was installed "properly".

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  4. #4
    Join Date
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    Default Re: Fiberglass insulation in attic

    Properly installed and uncompressed fiberglass batt insulation offers an R value of roughly 3.14 per inch.

    That wouldn't be the case for what is pictured.

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  5. #5
    Michael Garrity's Avatar
    Michael Garrity Guest

    Default Re: Fiberglass insulation in attic

    misread the question,sorry and of course the two previous posts are correct.The batts should be fluffed out as opposed to squished.


  6. #6

    Default Re: Fiberglass insulation in attic

    I believe that some unfaced batts have the R value written on them. What are those numbers on the batts? Looks like thirty something.


  7. #7
    mathew stouffer's Avatar
    mathew stouffer Guest

    Default Re: Fiberglass insulation in attic

    I think is said R38, the insulation was 13 inches thick so that would be in the ball park. But the entire thing was a hack job


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