I have been reading a lot of the posts on insulation. We have a 1920 house that was insulated a few years ago with blown in insulation. The contracter insulated only the areas of the house we use. He created a barrier around the outside areas of the upstairs walls encapsulating it from the attic. My question is that the uninsulated areas of the attic get quite hot (even with an electric vent and roof vents). The blower for our central air is housed in part of the attic without insulation. We have already had to replace the motor after only two years of use. Should we insulate the attic itself? Would that keep the temperature down in there? If so, what is the best way to do it? The floors are already insulated, but the exterior walls and roof are not.