Yes, the traps are all going to be 703 or equivalent cotton stuff.
Got Rod Gervais' book (and the Alton Everest Master Handbook of acoustics, and...), great info.
Today they finished nailing the OSB to the roof. Tomorrow the "real" roofer comes and puts up the shingles etc.
I started filling in the holes with caulk and foam.
...and finally inspector Bamboleo finished checking the roof construction