Maybe, in case the next renovation is due, you know for sure which parts are to be preserved and which can be removed. However, some craftsman or architect doing that should be able to tell the difference between modern boards and windows and ancient ones without relying on the help of white plastics or baby blue paint.
I work in stone conservation and for the body that dictates these regulations, even if it was built out of stone it would be required to be visually distinct. The only exception is if it were reinstatement of an original feature that had been demolished or decayed to the point that it had to be removed and fully rebuilt. In that case every effort should be made to source the stone from the same quarry, and the same mortar mix should be used.
Maybe to not be misleading about what is original and what is new
I cant understand why that would be a bad thing
Maybe, in case the next renovation is due, you know for sure which parts are to be preserved and which can be removed. However, some craftsman or architect doing that should be able to tell the difference between modern boards and windows and ancient ones without relying on the help of white plastics or baby blue paint.
I think you could tell when it goes from stone to plastic.
I work in stone conservation and for the body that dictates these regulations, even if it was built out of stone it would be required to be visually distinct. The only exception is if it were reinstatement of an original feature that had been demolished or decayed to the point that it had to be removed and fully rebuilt. In that case every effort should be made to source the stone from the same quarry, and the same mortar mix should be used.