The flooring isn't styrofoam, it's some form of high density construction foam....styrofoam is in the walls though.
I'm going to take the door off an get that rotten board out, and cut out the really bad plywood...then I'll know if there is (supposed to be) a stringer anywhere near there...I have to admit that it's really weird that the board just ends with no support around it....all I can figure is that the plywood and the 2x4 were glued together at some point in time, but once the rot got to the board it went south quickly.
Re: construction details....all I wish is that they would of used marine grade plywood instead of this cheap stuff...I bought the aerolite thinking I was getting more aluminum and less chance for rot....little did I know that most campers have the same weak link.
T.
