How to Set Up a Cat Flap

How to Set Up a Cat Flap

A cat flap — also called a cat door — gives your cat the freedom to move between rooms or in and out of the house without requiring you to open doors. Here's how to choose the right one, install it, and train your cat to use it.

Types of Cat Flaps

• Basic flap: Simple hinged door that any cat (or other animal) can push through. Lowest cost, easiest to install.
• 4-way locking flap: Can be set to in-only, out-only, both, or locked. More control over your cat's access.
• Microchip-activated: Opens only for cats with a registered microchip. Prevents other animals from entering.
• Magnetic collar key: Opens for cats wearing a specific magnetic collar key.

Top Pick: Depets Large Cat Door

The Depets Large Cat Door is an excellent all-around option. At 9.9" x 9.2" outer size, it accommodates cats up to 23" circumference. It features 4-way locking for full access control, weatherproofing for exterior installation, and works in interior and exterior doors. The clear flap allows cats to see through before pushing, which encourages use.

Where to Install

• Interior doors: Between rooms (e.g., laundry room for litter box access, bedroom door)
• Exterior doors: For outdoor access — requires weatherproofing
• Walls: Possible with a tunnel extension kit
• Glass doors: Requires professional installation or a specialist glass cat door

Installation: Step-by-Step

1. Choose your installation location — the bottom of the flap should be at your cat's chest height
2. Trace the template provided with the cat door onto the door surface
3. Cut along the template line using a jigsaw (wood doors) or appropriate tool for your door material
4. Insert the cat door frame and secure with the provided screws
5. Attach the flap and test the locking mechanism
6. For exterior installation, apply weatherstripping around the frame

If you're not comfortable with cutting, a handyman can install a cat flap in 30–60 minutes.

Training Your Cat to Use the Flap

Most cats need a brief training period to learn to use a cat flap:

1. Prop the flap open initially so your cat can walk through without pushing
2. Lure your cat through with Friskies Party Mix Natural YUMS treats
3. Gradually lower the flap so your cat has to push it slightly
4. Progress to the fully closed flap over 3–5 days
5. Reward every successful use with treats

Most cats learn to use a cat flap within a week. Kittens typically learn faster than adult cats.

Security Considerations

A basic cat flap allows any animal to enter your home. For exterior installation, consider a microchip-activated flap to prevent other cats, raccoons, or other wildlife from entering. If using a basic 4-way locking flap, lock it at night to prevent wildlife entry.

Keeping Your Cat Safe With Outdoor Access

If your cat will use the flap for outdoor access, ensure they wear the Airtag Cat Collar Breakaway with Apple AirTag holder for real-time location tracking. The breakaway design ensures the collar releases if caught on something outdoors.

Final Thoughts

A cat flap is a simple addition that significantly improves your cat's quality of life and reduces the number of times you need to open doors. The Depets Large Cat Door is a reliable, weatherproof option that works for most cats and most door types.