Metal Frame Basement Window Replacement Question
My house has metal frame hopper windows in the basement.
Which is the best method?
1. Remove metal frame and put replacement direct against the concrete?
2. Remove metal frame, use pressure treated against concrete and then replacement against that?
3. Leave metal frame and drill replacement window in it?
My window is just like this.
I’ve seen it done all 3 ways but not sure which is correct.