We have two storied house built in 1988. Our master bedroom is on top of the two car garage. As the garage gets hot especially on sunny days, the bedroom floor gets hot accordingly. I suspect the ceiling may not be insulated or poorly insulated. The air under the bedroom has no air outlet/vent.
My insulator tells me that if the ceiling has no insulation, he could blow in fiberglass insulation, but if the ceiling has some (inadequate level of) insulation, then it would be difficult to blow in additional insulation. Any suggestions?