Hi Tim
I looked thru your pic's. You have a restoration project there for sure. Best of luck to you. Since you had no fear in taking it apart, with some wood working skills you can rebuilt it to be a real nice camper.
Your unit is made a little different then the newer ones so we too are learning here with you.
The siding, that I may be able to help on as I had to remove some on mine to fix a rotted slide floor. The siding is installed from the top down. Backwards of house siding which starts at the bottom and goes up.
Mine was stapled on your I'm assuming is. I started at the bottom and went up. This is how I got the stables out so I did not damage the siding to be able to reuse. Once you get the 1st bottom piece off, then you can see the staples on the next layer up. They interlock with each other. You will have to take the corner molding off or at least the bottom few feet as they seal up the corners and the siding is under the corner. When you out it back on use Butyl sealing tape. They also sell putty tape, a few bucks cheaper but does not seal as well.
Get a fine screw driver to get under the staple
Once you get it started then use a pair of needle nose type Vise grips and pull
That way it helps prevent denting the siding trying to pry on it. Once the staples are out it will fall off.
Putting it back on I used exterior staples. These are driven by an air gun.
Wood that has started to rot that you find is complex to replace, they make products not to stop the rot and build the wood back up.
I used this on any stained wood to make sure I killed any fungus that was active. The wood was hard and not soggy but before I sealed the wall back up wanted to make sure the rot was not going to restart or turn into dry rot. Here is the site
Wood preservation, rot repair, and restoration using epoxy resin on boats and homes.
If you can get the bad wood out is best but wood that is sound and questionable should be treated. They use that stuff to even build up wood that is "missing"
The floor and seal, yours is made different in this area from what I think you are saying. The newer ones have a waterproof membrane across the entire bottom and it wraps up partly up the sides a short ways. It has it pro's and con's. Looks like this. They put it on before they put the floor on the frame.
I know many Pop Up campers have about nothing on the bottom but bare OSB board. They also do not has insulation either. Any exposed wood you should treat or cover some how to keep the moisture out.
Some of the older Sunline had an aluminum sheet under the camper. I do not know which ones or years but someone had one here on the forum.
Hope this helps and let us know how your progress comes along. It is really neat to see what folks have fixed and turned their restored Sunline into.
John
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Current Sunlines: 2004 T310SR, 2004 T1950, 2004 T2475, 2007 T2499, 2004 T317SR
Prior Sunlines: 2004 T2499 - Fern Blue
2005 Ford F350 Lariat, 6.8L V10 W/ 4.10 rear axle, CC, Short Bed, SRW. Reese HP trunnion bar hitch W/ HP DC
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