Re: blow in cellulose or take down plaster and use fiberglass insulation?
Ladies and gentlemen, be warned, if you wish to battle go else where for i will delete you. Challenging one another respectfully is allowed.
Blown in insulation or injected foam insulation does help in providing insulation and air infiltration blockage, however the biggest savings dose come from attic insulation and weather stripping including weather stripping of windows and doors.
Be sure you live your life, because you are a long time dead.-Scottish Proverb