When planning the floor, I have noticed that the inside wheelhouse is not isolated. Either we have forgotten it (because we always sat on it), or it was not yet clear how the interior will look like, and we have deliberately left open it ...

However, they had to be isolated. Just a can of Sika T2, 1qm xtreme-isolator and 3m duct tape later, things were isolated.

I have omitted the protective steam barrier foil this time, because since my last visit to the caravan shop I know: xtreme-isolator is already water and steam proof.