New here with a insulation question?

[getvrtcl]

For me the big issue was space, I did not want to loss any space.

[Engineer Guy]

I'm just finishing up a Solar, super-insulated House and the rules still apply to small spaces. Like the CT conversion I plan to undertake next...

Consider removing the plywood walls. Install Poly Iso Insulation at R-8/inch. Or, as I plan to do, install an inch of it between the steel or aluminum frame braces. Then, install another inch of it over that, screwed into furring strips, for an R-16 wall. You'd 'lose' only a net inch of space on either side. Heat rises, so install 3" or so of Poly Iso Foamboard in the ceiling IF space permits. One rule is to install ~2x the insulation in the ceiling as you would in the walls.

I've roasted and shivered in Trailers, and over-the-top insulation is the way to prevent that issue. Also, A/C and heating needs really drop with super insulation.

Heat you never lose you never have to replace by any heating method. Carpeting, etc., is not really insulation. Insulation has lil air 'bubbles' in it, and those are the true insulating 'bits'.

[jwhite]

looks like I am going to add all the insulation I can just like the last post suggested I can get 2 layers in the ceiling and I am also going to put 2 layers on the wall.
I ran my 12000 btu portable AC today and it never really got very cool and it wasn't that hot today,but I was working inside and out so I opened the door quite a bit.
I hope that what cooling it does do I can keep it inside.
I got most of my kitchen area built today so I am pretty pleased.

[Trackstriper]

.

Consider removing the plywood walls. Install Poly Iso Insulation at R-8/inch. Or, as I plan to do, install an inch of it between the steel or aluminum frame braces. Then, install another inch of it over that, screwed into furring strips, for an R-16 wall. You'd 'lose' only a net inch of space on either side. Heat rises, so install 3" or so of Poly Iso Foamboard in the ceiling IF space permits. One rule is to install ~2x the insulation in the ceiling as you would in the walls.

Sounds right. I will have aluminum composite interior walls (don't ask) in my cargo conversion and originally was going to use just 1" insulation in the walls, 2" in the ceiling. But after some serious thought over the past few month's I will be giving up 1-1/2" interior space to furr out the steel wall studs with wood and add an additional 3/4" of foam board. The thermal bridge of the steel studs could make the aluminum really cold in the winter. This may not be for everyone though. I just remember someone talking about having condensation at the screws going into the studs on their conversion trailer and it was a wake-up call to me. So it will be 1" extruded polystyrene between the wall studs and 3/4" polyisocyanurate (previously purchased for use between the studs) between the furring strips. I can live with the loss of an inch and a half although it does cut down on usable space.