My shower room does not have a window. One of its side is out facing, i.e. one side of the shower room happens to be part of the exterior wall of the house. I'd like to open a small window on it so air and sunlight can enter into the shower room. What should I know before starting the project?
House: regular singular-family house. There is nothing special about it.
Location: Chico, California
Exterior wall from what I can see is just regular vinyl siding wall. Interior is covered by ceramic tiles.