I want to build an exercise room addition alongside my garage. I have only 6 feet by 14 feet available. I'd like to do a cement floor. The roof can tuck under my existing eaves. I plan to do insulation, drywall, and a through-the-wall AC/heater combo. Roughly what would the room cost?
My heating and cooling ducts run through my attic. I'm looking to add more insulation to my attic. So which kind and style would work best in my situation (spray foam, spray loose insulation, or both? Best bang for my buck and best energy plan?