I belive in the over insulation for one purpuse.
heating the dang thing.
I don't need to use much heat to heat it.
I use a 12 volt cermamic heator from a truck stop to heat mine.
it is 300 watts and called a road pro heator.
it is very small on heat out put.
with the extra insulation. I can stay plenty warm at nights.
I live in wyoming where heating is not a option but a nessity from like,
1st of august. and at some of the high elevations where I like to camp it can get frost on the grounds even in the summer times.
I do like the guy posting before me have most my insulation in the roof.
I have a double layer roof and I am talking 1x6s boards butted up to each other.
I have 2 inches of blue foam insulation between them and as I built my teardrop and closed the foam in with the bottom layer in 2009. I could feel the teardrop getting cooler as I worked in my hot shop.
I just compleated my last inside wall today. and feel It made for a really not so hot trailer too.
I camped out in my teardrop in july which was baking hot around 98 degreas and I was thankful for that insulation.
My walls have never sweated with it. My car carpet is just on my ceiling so far. but will be going on my walls soon.
I never with my 2inch foam in my walls or ceiling get much on condesation in my teardrop.
One reason is no humity in wyoming and one reason is the insulation.
Plans. there was supposed to be plans to be followed when I built this thing. Opps! AH, gee, tum,tee tum. I think I forgot about the plans 2 years ago. ------Tow vehicles, 1995 ford explore, 1994 ford ranger, 1993 ford F-150, 2009 4x9 Off road teardrop, on harbor freight greatly modified frame.