I’m in the middle of building a shed and didn’t think too carefully about the trim boards. I was planning on using azek (PVC) for trim around a couple doors and windows. All the videos on youtube that show people building sheds with this stuff just have them nailing/screwing the trim in on top of the siding. Installing trim first, then cutting the smartside panels to fit around them is a pain in the a$$.
I’m assuming if i want it to last, i should definitely install the trim first, with the flashing. I’m just worried about desperately cutting the panels to fit exactly around a window. Any tips for ease of doing that or just trust my measurements and make sure the framing is all square.