In order to remove the old door & frame, you will need to disconnect it from the lattice wall, floor, rafters and top cover. Once that is done you can install your new door & frame.
Detailed instructions for replacing a Door & Frame that was made prior to the year 2000 can be found in our pre-2000s instructions.
Instructions for replacing a door & frame that was made in or after the year 2000 can be found in our post-2000s instructions.
Pricing for a replacement door can be found here.