On Wed, 17 Mar 2021 07:50:46 -0700 (PDT), Sonny
wrote:

I made an exterior door for my nephew's pool house. The glass panes are installed from one side of the door. I'll call this insertion side Side A. When installing the door onto the house, which side of the door should face to the outside, Side A or the other side? Or does it not matter which side faces outward?

Assuming you used conventional glazing methods with glazing compound
and paint, Side A should face outside. The glazing compound and paint
provide a weather resistant seal. If Side A is inside then there will
be an unsealed crack around the glass on the outside into which water
will seep, which is generally not good.