Pro-Rig V2.0 - Home Built Compact Composite Pop-up

[DzlToy]

"The spray adhesive used on the wall with just foam insulation is not. "

Can you elaborate on this? Are your interior wall panels delaminating from the XPS foam core?

 

[CoyoteThistle]

No. I didn't explain that very well. The camper is built from honeycomb core composite panels - those are fine. I recently added Vacuum Insulated Panels (VIPs) for insulation inside the structural honeycomb panels. I used 5/8" foam board where I couldn't use the VIPs (especially one side wall). I covered the VIP's and foam board with 1/8" luan plywood. The plywood is attached to the VIPs with VHB tape. I used spray adhesive instead of VHB tape on the one wall to minimize the thickness of the additional insulation. That is what failed - plywood to foam board bond that was just pressed in to place in a vertical orientation (not an ideal way to get a good bond). You or I would have to dig back a couple pages in this tread to see which spray and foam board I used. Hope that made a little more sense out of a complicated story!