Replacement Window - Nail Fin Question
I have a dilema in which I'm replacing a number of 9-yr old vinyl windows in my house. I have wood casements and jambs inside the house that I absolutely do not wish to remove. I'm considering removing the j-channel and vinyl siding and pulling the old windows out from the exterior. I would like to use a replacement window (no nail fin) and install and shim from the outside of the house. My question is, besides foaming in the replacement from the outside and re-installing the j-channel and vinyl siding, do I need flashing or a better way of sealing the rough opening to replacement window gap?