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

PINK FIBERGLAS® Insulation R30

Originally Posted by mathew stouffer

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".

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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P.S. Echo...seems fast fingers beats turtle speed connection again.

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

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

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