We just upgraded to a new (new to me) Caribou. Our old camper only needed one sheet of 3/4” plywood under it to give clearance on the cab and bed rails, I attached it to the bottom of the camper.
The new one requires 2” to get everything clear. To get it home, I stacked two sheets of 1/2” OSB and some 3/4” plywood.
What I would like to do to get 2” is a sheet of 1 1/2” styrofoam house insulation board with a sheet of 1/2” OSB on top and not attach it, but just have it in the bed of the truck. Has anyone used the foam board with success?

 

Here’s a couple of pictures of the upgrade.

Old One


New One

 

Can you build a 2x2 frame wall with a sheet of 1/2" ply on top? Not too heavy to handle and still giving some rigidity to the structure?

 

You know, I think I’ll do just that! I was thinking about the insulating value of the foam as an added bonus, but I think if I make a frame structure like you said, then fill the voids between the wood with the foam I’ll have the best of both!
Thanks for the tip!!! 👍

 

 

I've done exactly that in the past and it works just fine.

Steve

 

Dealer installed 2” Foam Board when I purchased my new Adventurer 89RBS as it was needed to clear the Septic Hose Storage Tube. Light weight, easy to store when Camper is off.

 

This is what I did. Keeps the floor warmer in cooler weather.

 

That’s what I was thinking. So it did make a difference? As long as I have to lift it, I may as well insulate it as well!
We haven’t unloaded it yet, but when we do I’ll fix it up with some foam.

 

By the way, Thanks all 😊.

 

‘Yes it did make a difference. My wife commented on it when she first got out of bed that the floor wasn’t as cold.
Happy wife, happy life!

Just an FYI, these foam boards come in different densities. Most are listed as 150 (what I don’t know) but I got one with a density of 250 which can support more weight and it has worked fantastically.

 

I was using some of that rigid foam board yesterday in my trailer. These are all scraps that are leftovers from a prior trailer project (fresh water tank insulation). I happened to glance at the label and it said, "F250". In my warped mind, I of course thought, "I need F350 to match the truck."

When I first read this thread, I thought that using the foam board alone would result in compressing it once the camper was installed and it had a few miles on it. I would have used a frame to prevent that. So I'm surprised to hear that the foam board is working without a frame. It's tougher than I thought. Good to know.

 

This is what I used.

https://dcpd6wotaa0mb.cloudfront.net...=1577336056000

 

Very cool😎 Is that board a Home Depot/Lowe’s item!

 

Structural foam makes a great/light weight riser.