Insulation question (yes, another one or two)

[CARS]

I've been sick most of this week so I have been reading, reading, planning, re-reading, etc. What else is there to do?? Overthink things!!!!

I've been camping in tents when it got cold and woke up to a rain-forest in the tent. I understand condensation forms when 2 surfaces are of different temperatures. (that may be over simplifying it?)

Some people swear by insulation, others say it's a waste of time. Is 1/2 foam enough to matter??? How about 2"??? Does it matter as long as you are creating a thermal break??? What does it take for that thermal break to happen?? A poly vapor barrier???

What about the framing area's of a sandwiched wall? If you frame your door out with 1"x3"'s wouldn't condensation occur on these areas?

I don't camp when it's cold (unless you consider the occasional 40 degrees at night cold?). I am planning a roof vent and heat. Possibly side windows that open (if I can find/afford them).

[Loader]

Hello Chris,

By no means can I claim to be an expert in this area, however, I do know that a single layer of 3/4 inch foam board insulation available at the big box stores (often found in the colors of blue and pink) in the walls does the trick.

In the roof, I used (and plan to use in my on-going second build) a double layer (1 1/2 inch thick).

In my first tear, I never experience any condensation problems. Of course, I do leave the roof vent and door windows cracked open at night.

Good luck with your build!

[CARS]

I do plan to insulate the roof. Why not? I have space to fill between the spars anyway.

It's the sides, or should I say my constant thinking to keep it simple that is making me question insulation. Cutting ply to shape is easy. Add doors and windows and well, it gets a little more complicated.