Ive got 12" of insulation in the attic and the walls seem tight. The cheap ass builder grade windows however, are letting plenty of cold in. As soon as the weather breaks in Spring I'll be calling Thermal Windows of OK to replace them all. I had their windows in my last house and that was the best $7k I ever sent. 13 windows and a sliding back door. I couldnt even hear thunderstorm or hear a Harley speed past. Heating and cooling went down probablyI ain't even opening the door here.
All that cold out there is already doing its best to get in here. No way do I want to help it.
35-40%