I now want to trim out the door to give it a nicer look and so that I can insulate between the jambs and the rough opening. What is the usual advice here? I could use PT for the trim since I will have the same end grain problem with the trim that I had with the framing for the rough opening. Also, the edges of the trim will be touching concrete since the basement where the door is installed is not a finished area. I am not sure if having wood touch concrete on an edge is a problem.
So, I see two potential solutions. One, use PT 1X4s for the trim. I will not have to worry about moisture from the concrete, but the idea of PT trim seems a bit weird. Painting wet PT does not sound too useful.
Two, use pine trim as I would for a normal interior door and keep the bottom of the trim 1/8" off the floor. This solution is more easily painted, which is nice, but will have pine edges touching concrete. No end grain issues here, but are pine edges that touch concrete prone to moisture absorption?
Any thoughts would be appreciated.