To do the job correctly you will need to order a new construction window or buy nailing fins for your replacement window. Awning and casement windows do not accept replacement windows.

Replaced a wood casement window with a vinyl double hung.

Remove glass and glass frame.

remove all hardware.

remove and save bottem wood strip on window frame.

Do NOT remove window frame.

Instal new vinyl window with shims and screws through sides.

Replace bottem wood strip.

Caulk all around.

Go outside and admire window.