When I put in the first bat of R38 I checked and there is no vaper barrier
anywhere. It goes something like this: ceiling wallboard (1/2 inch thick),
ceiling joists (2x4), 2 -3 inches of probably rockwool insulation (at least
35 years old) between the joists, R38 bats of insulation laid perpendicular
to the joists to cover them.

The first layer is unfaced and I was planning on purchasing unfaced again.
Is the lack of a vaper barrier a problem?

Thanks,

wrote in message
ups.com...
Go for it. Did the same in mine, and I'm sure it helps. Don't have a
vaopr barrier in the middle though. Buy unfaced.


Jason wrote:
Is there such a thing as too much attic insulation? I have R38 in the
attic
at the moment, but the local building inspector says they like to see at
least R50 in new homes. Would adding another layer of R38 (total R value
would then be R76) perpendicular to the existing layer of fiberglass be
overkill? Or will it make a difference? Does attic insulation really
cut
down on heat gain in the summer and heat loss in the winter? Or is there
some other place to look to cut down on heat gain?

Thanks,