The addition on my neighbors’ house is coming allowing well considering the holidays. They have gutted the inside of the original house as well. It looks like they need to trim the big tree in the back a bit more. It is almost touching the new structure. It looks like the new outside walls are 6 inch studs. This should let them install a minimum of R19 fiberglass, R23 Roxul or up to R36 with close-cell foam. I am guess they’re just going to do fiberglass.