Here's a few photos of a window that I installed last year. I used the mixed knowledge of a few different online articles and did it to my best ability, but I'm kinda worried that it may have been done wrong. If so, and I was wrong in a significant way, I'll probably have to fix it. Any words of wisdom are welcome.
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The only thing at all possibly risky that I see in that AWESOME looking installation is the exterior shot of the window mounting.
The top edge of the window flange (I think is the word) points up, creating a potential point for water entry behind the window.
This is mitigated some by the near proximity of the siding above, but driving rain could still get in there.
I would therefore recommend you put a waterproof material around and over the edges of the window, and extending up to underneath the siding, to ensure that water that does hit that wall cannot get behind the window.
Beside that, dude, that looks great!
Looks really good. In addition to Greebo's recommendation of some flashing, the only thing I can't tell from the pics is how well-anchored the header is. When you cut a hole under load-bearing structure, you need a good header to distribute the load across the span instead of having that weight bear down on the window. I see that you put in jack studs (good) with a wooden header (also good) to frame the window, but I can't tell if the header is recessed into the concrete or if the load picked up by the header is just supported by the jack studs.
Out of an abundance of caution, I would have recommended a steel lintel above the header and cut into the foundation, to help bear the load and distribute it into the concrete on either side. But, it looks really good and you shouldn't have any problems for a very long time the way you did it.
