[Seamus TM]

Originally Posted by henryrobinett

Thanks mumblesound. Do you or anyone else have an opinion about ATS. Supposedly it similar to 703, but cheaper.
ATS Acoustics Rigid Fiberglass Board

That stuff will work fine.
I somehow doubt that ATS makes their own fiberglass, but regardless...
After shipping to Sacramento, you're looking at $92 for 6 sheets.
That's still almost twice as much as you could probably find locally at a non-chain building supply distributer/warehouse.