Greetings!
For people reading this thread, it is probably important to add a few simple, undisputed facts…
With insulation alone, Mother Nature will eventually always win out. If we truly want to ensure our comfort, that requires active heating and/or cooling options. Insulation alone can not accomplish this unless Mother Nature is being cooperative.
Perhaps the most important take away on insulation, is to make sure that condensation, moisture, mold, and eventually rust, can’t get trapped behind it. Where there’s air, there’s moisture, and if that air is trapped, you have problems.
Cheers!
"Opportunities are everywhere, but only action makes it happen." ~ Van_Dweller