I was sad about how much heat and air conditioning I was losing in my home, but i had read that only about 40% of my heating & A/C was lost when traveling through the ductwork.
I then read how another 10 to 15% of heating & A/C was lost due to lack of insulation in the home.
I had a supplier come to the home and check my insulation, and there was a lot of energy loss through the insulation in the floor of the attic. The insulation had become stiff and flattened over the years, but small critters and bugs had caused the insulation to lose a lot of its efficacy. I’m not saying my home was infested with mice or other critters, but they make their way into homes throughout the years, my insulation needed to be replaced! Once the supplier had completed the insulation in the attic and walls, he told me we still needed some work done, and he had to put new insulation around all the windows and doors. He asked if we ever saw condensation on the windows. He then asked if we ever found ice on the windows. He wanted to know if our mudroom had a draft. He said we needed three windows replaced, and the insulation around the windows and door needed replaced. It surprised me how much difference there was in the room, but where I had a constant draft in my mudroom and in the family room, it was now gone. I was blissful I called the supplier and had all the insulation replaced, but the replacement insulated windows made the largest change.