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72cougarxr7's avatar
72cougarxr7
Explorer
Nov 03, 2017

RV Insulation spray foam vs foam board, pros and cons

Planning to rebuild my 1995 Komfort TT in the spring.
Roof failed and pretty extensive rot in ceiling and walls. Will probably end up rebuilding all walls and roof, was thinking about getting it spray foamed or using rigid foam board and using canned foam between foam boards and studs.

This will be a 3 season camper so I would like a good R value.

Aluminum siding and a rubber roof, got me thinking if i should put something like Tyvek between the outer wall and the tin to keep any condensation from the metal off the wall.

Any experience with either method?
Trying to avoid fiberglass.
  • Spray ffoam might have a tendency to break down and fall when traveling creating voids and cold spots. Not sure, but worth looking into. Rigid foil backed board, you would probably want to use 1 inch and half inch sandwiched together to fill the void might be a better option for RVmuse.