Rigid Insulation, its speaking to me

[steamguy56]

It does, it waits untill I'm all alone inside taking all the overhead racks down, bathroom out and exposed it for what it is, ridged insulation. Now when it gets hot in there direct sun lite, it begins to make all kinds of sounds. It is in there really nice and tight good job of gluing it up, no holes anywhere...just loud. So should I pull it out and spray foam or is there any other product less noisy.
              Thanks Danny

[TomC]

This is one of the main reasons I used spray foam.  What I did was strip the interior down to the frame, but with the exterior skin still on. Then screwed 1x2 fir strips over the steel wall and roof supports going length wise about a foot apart.  What this did was to make the wall thicker for better insulation, and to extend out the insulation beyond the steel supports.  If you only insulate between the steel supports you still have the steel supports transmitting heat/cold into the bus.  Also, now have a good base frame work to attach wall coverings.  Good Luck, TomC

[Dallas]

Danny,

Since you've already got the Styrofoam, why not go down to your favorite home center and purchase a few cans of minimally expanding spray foam.

Force it into every nook, crack, cranny and crevice. I will just about guarantee the foam will never move again.

After that get a couple of hundred dollars worth of Reflectix and cover everything lengthwise.

The styrofoam will still allow the skin to move as it heats and cools, but will itself stay stationary. The sprayfoam will hold it in place against the framework and close off any possible leakage around the styrofoam.
The Reflectix, since it is just plastic bubbles encase in two sheets of aluminum foil will not only reflect heat back toward the outside, but the bubbles will create a dead air space over the frame and crossmembers.

Simple, elegant and cost effective.

Dallas

[BusCrazyTom]

That's one heck of an idea, Dallas. I'm going to remember that for my conversion.

Thanks
BusCrazyTom the Analog Dinosaur