I have a home with Hardie Board siding and trim. There is a tiny gap between the edge of the installed windows and the Hardie trim board ( Please see the gap where my finger is pointing in the picture below). It’s kind of hard to see in picture because the gap itself is black and blends in with the window, however, the gap is a around 1/8th to 1/16th of an inch wide and goes all the way around the window. The gap is due to the white trim not completely touching the window housing itself.
Should this gap be caulked or am I missing something? I plan on using silicone to seal that gap on the top, left, and right sides. I’d leave the bottom unsealed so it doesn’t trap moisture.