I am building a 10' x 10' observatory. I'm getting ready for the walls and need direction.
I am in western colorado at 6800 feet. Winters are cold (lows in the low 30's - 0's) and summers are hot (highs in the upper 80's-90's). The sun heats the south and west sides of my house strongly and I am concerned that the same will happen inside the observatory. My goal is to make the walls as thermally neutral as possible within reason.
So, the basic construction will use 2x6 framing and standard 1/2" exterior board with James Hardy siding on the exterior with drywall on the interior. I will have a vapor barrier in place. I will have wall vents and an exhaust fan to turn interior air over quickly. I am thinking a aluminum covered foam insulating board in the the south and west facing walls if not all four walls. I understand that having no insulation would be good but I want the interior temp to stay cool during the day in the summer but to follow ambient temp in the winter. I am not planning on an air conditioner for summer use but perhaps that might might be needed.
Bottom line, what are my options?