Originally Posted by Mike_L
I'm not sure why you would be attaching paneling to styrofoam. Usually, the glue is to attach the insulation and hold it in place and seal the spaces around it. Attaching the paneling to the stringers would be stronger? Some adhesives will melt styrofoam so check the label carefully.
There are no stringers in the walls, though there are in the ceiling and floor. The walls are just a sandwich of fiberglass shell, EPS foam and paneling, each layer glued with a pink contact cement.
Polyurethane glue did not adhere well gluing stringers to the floor. I ended up using epoxy.