I’ve been collecting building materials for literally years. Some of it I’ve used already in various projects, some have sat there, collecting dust and waiting. One of my favorite finds was 2 full sheets of 2″ polyisocyanurate for only $8 each. That’s incredibly cheap for quality insulation, at approx 13 R-value. And now it has finally found a use. 🙂
First though, some pictures showing the steps I’ve taken so far.

Had to cut the rim joists around the metal bracing. Wood is set on special barrier to protect it from metal condensation.

Used a 4×6 for the rim joist as I needed the thickness to match up with the bolt holes in the truck frame. Once I get them installed it will all become clear.

Didn’t have quite enough polyisocyanurate to cover the whole bed, so used 1/4″ layers of some rigid insulation to fill the gap.
So it looks like the blue insulation isn’t laying level in the last picture. That is due to the metal panels having ridges which are pushing the pieces of insulation up. Once the joists are in, the insulation will be perfectly fine. This type of insulation is rigid, and doesn’t easily get squashed (which loses R-Value).
I’m a real fan of insulating well. This bottom layer of insulation isn’t the only one for the floor. I’m using 2×6 joists set at 24″ On Center, as I already have a supply of Roxul that sized for that opening. Roxul, like polyisocyanurate, handles moisture well and isn’t susceptible to bugs. So these bats will go between the joists, creating another level of insulation.
In the last picture is one joist that I place there just to admire it 🙂 Nothing is bolted, nailed or screwed down yet, as I need to return the bolts I bought and get longer ones…sigh. I always end up returning something I’ve sized wrong…at least this is an easy fix.
For the mess of metal bracing behind the cab, I believe I’ve figured out a solution. I got hot and tired so didn’t do it yesterday, but will today as soon as I get back from the hardware store with the proper bolts. I will take pictures, although it might look wonky. You asked for the pictures, and you shall have them!
I’ll also show the bolts installed to show the strength of the framing. This will be a good, strong little space.
Thanks for reading my little blog about my little house Oliver’s Nest. I appreciate it very much!
Peace to you all.
Never give up! 🙂
Thanks Eddy. It is a long, hard road sometimes. But if you’re breathing, why not try to do something interesting at the same time?