Just bought my 5.5x10' cargo trailer

[Jrst67]

I would think it depends a lot on the size and location of the windows. A bare wall would allow you to place them between studs and to reinforced around the window if you do have to cut through the studs. I would suggest laying them out without the interior walls installed and see exactly what you situation is, then make a decision.

[Padilen]

I think it's 1/2 the R value.

[hankaye]

gregcoit, Howdy;

Hi all,

OK, I have another question. I just got off the phone with the local lumberyard. I was asking about solid foam sheets (the blue stuff) and they said that styrofoam is almost half the cost for not much less R value. Ye,s it's messy, but once it's in the wall, that should be a problem. What do you guys think?

Greg

Sorta depends on where you live, what the temps are like (Winter and Summer), what your comfort
level expectations are (if your married what hers' is trumps yours ...), all that kind of stuff...

hank

[hankaye]

gregcoit, Howdy;

In your first post you mentioned that your trailer weighed in at 550# ...
is that sticker or did you scale it? Website says 510# for the 10 footer.
Did a bit of lookin' around and found this;
http://parr.com/PDFs/PG_plywoodthickness.pdf
might help ya figure out an answer that works for you.

hank

[Rainier70]

Since the height is 5 ft you could probably put in a teardrop style side door.

[aggie79]

I think it's 1/2 the R value.

The "white" insulation board (EPS - expanded polystyrene) has an R-value of 3.6-4.0 per inch of thickness. EPS has about 80% of the 4.5-5.0 R-value of "pink" or "blue" insulation board (XPS - extruded polystyrene). The insulation board with the highest R-value is polyisocyanurate (yellow-ish core) with an R-value of 7.0-8.0.

Regarding the plywood, I would use a single sheet rather than trying to laminate two sheets. Use a good quality Baltic Russian birch If you can find it. (This is not the birch sold at the orange or blue box stores.)