Protradecraft traveled to Westford, Massachusetts to the home of Building Science Corporation founders Betsy Pettit and Joseph Lstiburek, aka Dr. Joe, to film a replacement window replacement scenario not seen very often.
The updates are really only a big deal if you live in climate zones 4 or 5, like 65% (or so) of America does. But don't worry, climate change is making it smarter than ever to exceed the code minimum.
Removing the old window frame and weight pockets, reframing the rough opening, and flashing a new-construction flanged window into the old existing WRB