I can feel the heat bearing down from the ceiling in the living room, there is only the plastic covering at the top of the ceiling where the 2 sides join together. It was 85 degrees in the living room, rest of house was cool with doors closed, I can see there is no insulation up there to keep the heat out just a crack under there. What should be up there? Why do I feel heat coming in? I held up a temp gauge & was over 105 degrees this is killing the AC & its hot in here. Should I pull this cheep plastic down & stuff it with insulation or expansion foam? Isn't there anything better to put up here than this cheep plastic?