Quote:
Originally Posted by topfiverecords
If you do that, cross the direction of the layers of batts so you don't have seams lining up where you'd get gaps over time. Also helps lock everything together.
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Yes, that is exactly what I was going to do if I use batts. I would install the top layer perpendicular to the bottom layer. It's a bit more work, but it would eliminate the "thermal bridging" at the trusses. That's the nice thing about adding sprayed insulation over top of the batts - it would fill in around protrusions, etc. and give you a more complete thermal barrier.