Use a hammer or a drill to take out any nails or screws that are holding the window in place.
Install a window without siding on wall.
Nail into place either new siding ripped to size with your table saw or the existing siding if not overly damaged and install over the new window s flange to the edge of the existing siding.
Tilt the sash a little and align the metal pivots with the slots in the jamb liner closest to the exterior.
Cut the old wall studs to build a new window frame in an existing wall first remove the interior wall covering and any insulation to expose the studs.
Proper installation of siding around a window requires.
Fold the house wrap around the sides and staple them to the wall inside the room.
Fold the house wrap sides in staple them to the room side of the trimmers and king studs then slice off the excess on the inside of the house.
Tilt up the sash and press outward on the jamb liner while you snap the top of the sash into place between the jamb liners.
Seal the house wrap against the pan with house wrap tape.
Take the jamb size and sill height into consideration when planning the placement.
To the edge of the window to about 1 past the outside seam.
The newly installed window will need to be trimmed out with j channel or j molding before the siding can be reinstalled.
Caulk any major voids.
Make sure the pivots are above the sash lifts.