As could have been predicted, a hollow-core unfinished wooden door can’t really handle being an outside door. Fortunately, I was able to get a solid wood door at the Habitat Re-Store for $5, and it even has a nice window to let more natural light (and views) in.
The biggest trick — not that it was much of a trick — was mortising out the places the hinges would rest. I used the old door as reference; there were a few spots where the old hinge area came a bit closer than ideal to the new one, but it seemed to work out OK.
Now I’ve got some cleaning to do both inside and out, but that’s a topic for another post. 😉