Do not cut the vinyl off.
How to remove a window that has vinyl siding.
Zip tools disconnect a higher piece from a lower piece.
I would think that the best method would be to remove the whole window peel back the siding and replace it with the same size window with a nailing flange with either the built in channel or j it out.
Extract nails keeping the vinyl pieces in place in order to prepare vinyl pieces to be removed.
How to replace a window on a house with vinyl siding.
Look for a horizontal seam between two courses of vinyl siding.
Removing siding sections of vinyl siding can be removed fairly easily with the right tools.
To remove a piece at your eye level slide the zip tool under the piece above that one.
Use a siding removal tool.
70 water 30 white vinegar makes a great all purpose vinyl siding cleaner that removes light mold and mildew stains.
For a stronger solution mix.
The current windows are builders grade new construction vinyl windows with the nailing flange and built in channel.
Zip tools specially designed for the purpose are available inexpensively at home supply stores.
Diy how to fix loose vinyl siding with a malco sideswiper siding tool.
Use a zip tool to disconnect two pieces of siding.
Use this tool by inserting it where a piece of vinyl overlaps a piece below it and then sliding it across until you reach the end of the piece.
Pull the piece of vinyl siding downward to disengage it from the course below it.
Remove the pieces of vinyl siding from around the window area.
Measure the old window for dimensions for the replacement window using a tape measure.
Measure the height of the window from the top of the window sill to underneath the bottom of.
Reveal the nails anchoring a piece to the wall by sticking the zip tool under the bottom of the piece above it.
Measure the window width from jamb to jamb.