I live in a 1950’s home with old double hung windows. The windows are painted shut and a few are broken. We have saved and are ready to upgrade the windows but are not sure of the best approach. We have lathe and plaster inside and stucco on the outside.

I have replaced windows like the ones you have described. I wish I had understood the difficulty of the job before I started. Here is my advice to save you time and money. As you describe the wall components I know how fragile they are and how difficult it is to...