Styrofoam vs fiberglass matt insulation
While I have my camper apart to do some structural repairs, I've been looking at its insulation. its basically 1" stryofoam sheets. My understanding is that the foam sheet isnt as susceptible to ...
Forum Discussion
kohldad wrote:
Foam sheet are much better in campers. If the fiberglass gets wet, it loses it's insulation factor. Tends to sag over time from vibration and gravity. plus, when installed with pressure, foam also can provide rigidity to the structure, another plus.
Foam insulation has many variables which determine it's R value. The cheap white bead foam board is lowest, but high density foam actually surpasses fiberglass. 4" of high density with foil siding can exceed R-30 while the best batt fiberglass is R-15 for 3.5". If you want better insulation, do some research on different foam types and select a better one, though it will cost more.
If you want water resistance you'll want to use closed cell, not open cell. Another advantage of closed cell is it has a higher R value, but it also costs more.
