[RKDinOKC]

My HVAC is only about 10 years old. Supposed to be a lot more energy efficient that the original I replaced.

My house was built in 1981. It and the neighborhood was built cheap. Windows suck. They are single pane aluminum that sweat all around them in the winter. But the house is not drafty. Couple of years ago i put nice storm doors on front and back. The storm doors that were there when we moved in had gaps all around them.

Even with an insulated garage door, by 4pm it is the same temp in my garage as it is outside in the summer. In the winter I run a 1000watt thermostatically controlled space heater to keep my garage from freezing. Keeps the garage above 45°F in the winter. So I assume the garage walls and ceiling are not insulated at all.

When I replaced the roofing right before my foot fiasco I upgraded materials and and installed ridgeline venting to flow air in the attic better. Haven't beefed up the ceiling insulation, it's deeper than the rafters in most places.