I know there are several threads about this but I decided to start my own since I am not going to spray foam up into this area for the next time I have to fix this. First trip out this summer with our new 2012 381LEV purchased in Mar 2013. Coming back from Devils Tower this greeted me in my driveway:
This is the front frame section behind the generator and landing gear. The thin sheet of bubble plastic is somewhere in the Nebraska panhandle. Not a big deal, since it's negligible R-value anyway. I'm more concerned about the 6 AWG electric feeders and slide hydraulic hoses hanging free. The coroplast was secured on two sides by only a few very long self tapping screws and no metal strip.
The feeders from the generator had extra length which was coiled and pressing against the exposed threads:
If I remember from my Air Force days, electric and hydraulic lines aren't supposed to be clamped together. I got some rubber insulated hangers and screwed the hydaulic lines to the right frame rail. I routed the extra length of the electric lines over the gray water tank and clamped it where it comes through the frame under the front storage area. I clamped coroplast back up with some 1/2 aluminum strap to spread the load and drove screws every 6-8 inches. I peeked back to under the kitchen slide area and it's a rat's nest of hydraulic hose supported by nothing but the coroplast. That'll have to get fixed later though, got it winterized and put away for now.