when buying a motorhome new or used we tend to look at the interior,storage,kitchen area,what bed,towbar,etc, How many of us look underneath the vehicle. I looked at a 2007 lunar roadstar today and it ticked all the boxes. When I checked underneath (double skin floor) what a shock to discover the plywood flooring was not treated and you could push your fingers into it. Why dont they under seal these vehicles before they leave the factory,or is this the norm thing. Any ideas how much to repair this IF i bought it.