Things You'll Need
- Utility saw
- Plastic sheets
- Screwdriver
- Screws
- Utility knife
Instructions
Determine which door you'll use to cut an opening for your doggy door. Choose the door your dog most frequently uses to go in and out of the house.
Remove the door and lay it on a stable surface. Measure the opening you'll need for your dog and mark the door. The opening should be approximately 1 inch wider than the widest part of your dog.
Use a utility saw to cut the opening.
Cut the plastic into flaps that will cover the new opening. Cut two flaps.
Screw the plastic flaps into place over the opening. Attach one flap on the outside of the door; attach another flap on the inside of the door. Use plastic to cover the exposed edges of the new opening so your dog will not get scratched coming in and out of your home.