weekend of work
We did a scouting run last Sunday; some of the plywood sheathing had been water-damaged, so we noted where we'd need to replace what size pieces, and he who owns the pickup truck nicely procured the plywood for me. When we got up there yesterday and started prying pieces off, we found that the water damage was more extensive. The 2x4s in all four corners were rotted; we concluded that this was due to the trim we added after the initial construction. Apparently it was trapping water. So that's all gone now, and I'll have to figure out how to make the trim safe. Possibly the answer is "caulk eerything to death". (We've gone through five tubes of caulk without touching trim yet, so you might say I'm adopting that strategy.)
We also learned that the framing lumber wasn't pressure-treated. I just assumed it was. The damage was concentrated in the corners, so we replaced the bad pieces and added some sister studs in places, all with pressure-treated lumber. We also primed it even though it would be covered in plywood, 'cause, well, better safe than sorry.
So we had to buy and cut more plywood because of this, so while we were shopping I also picked up a power inverter. It's rated for 7.5 amps; it drove the 11-amp circular saw but not the 12-amp one. I guess there has to be a line somewhere. :-) (We have two batteries that aren't in cars, that we use to run lights in the camp kitchen and pantry for two weeks, so we used those to run the saws.)
At the end of today we had replaced all the bad wood that we're going to replace. (There are some iffy spots that we might tackle next year.) Everything is primed and some is painted. We'll pick some other Sunday to go up and finish the painting. Coming up with a new trim plan will probably be a winter project.
With luck, now that we have discovered and corrected an ongoing problem, future maintenance will be a lot easier.

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