- Joined
- Jun 8, 2006
- Messages
- 254
I have a 70'x20' shop and 20'x24' cooled with a 10,000 btu, I bought some 3" hard foam board insulation used in warehouse roofs. I can shut my ac off at 10:00 at night and its still cool at 3:00 next afternoon. And this is central Fl. in a metal building.










