I am looking to replace some windows. The current ones are quite old and the wood trim/etc around the windows are decent..but a low decent. (not great). Now I do know I could just replace them with the 'pocket' or 'builders' version which uses the existing trim and just fits in place. My only concern is that the windows and trim is not the greatest and I don't trust that those are in good enough shape to keep.
Now the question is if I replaced it with a new construction, what would I have to do to install them without needing to replace siding? My Concern is if I replace the windows, they will be too small that I will need to add siding to fit them into their previous opening.