Without tearing down the garage ceiling and having to re-drywall it, I don't see that I have much choice. I am considering just doing the parts of the ceiling that are along the outside walls of the house, that has to be where the cold air is coming in that is running down the joist areas. The bedroom above it is about 15 degrees colder than the rest of the house, and the bedroom floor (carpet) is ice cold as well. The insulation that is there in the garage ceiling now seems to be all right, seems to be about 10" thick in the 14" space, but there is cold air coming in from the 2 exterior walls somewhere that is traveling down the joist spaces. Any other thoughts? If I blow in insulation in to the last 3 feet of the joist space on the ends along one of the exterior wall, and then also the full space along the other wall (the wall that runs parallel with the joists), then I think that will prevent any cold air from coming in where they did not do it properly. That way I don't have to patch as many holes, and use more material. Thoughts?