Originally Posted by _ally
I am so grateful to see a SHELL ON subfloor replacement. Thank-you so much for posting. I don't have the resources or space to build gantries and I was about to give up on my Airstream dream until I saw this. There's a 1968
Overlander with some rear subfloor rot where I live and I've gone to see it twice already (it's not going anywhere---we're on a big island). Now to sort out if I can do a floor replacement in 2 weeks full-time + 4-5 weekends. I still have no idea how difficult it is to put everything back in afterward (I'm most worried about refitting/replacing pipes... my plumbing knowledge is severely lacking).
Thanks for showing us your progress and sharing your knowledge!
I struggled with the decision of going Shell on/off for a while too, changing my mind once or twice. Came to the same conclusions just like you I don't have the resources or i feared the time investing in building the gantries and doing the shell off would be the demise of the project. In general the shell on has been easier then some suggest.
I had almost no plumbing experience other than a few simple PCV pipe repairs.
The Pex Sharkbite system so far has been very easy to deal with, and i would recommend replacing ALL the incoming piping. The Drain pipes aren't pressurized and mine were in good condition. haven't turned my water system on yet so take it with a grain of salt.
the biggest thing you need to check on that trailer is the condition of the frame. If its got rear rot then most likely got rear rust as well. even if the rust is only on the surface you'll still want to grind and paint.