https://jsfiddle.net/waiterbrian20/963jd0vc/ https://www.openlearning.com/u/kejserbland-skobju/blog/DoorsWithCatFlap https://dissing-bland.mdwrite.net/cat-flap-installation-how-to-choose-and-install-a-cat-flap-1727781021 You and your cat can both benefit from adding an animal flap into your bifold door. It can also help keep extreme hot or cold weather from entering your home. The first step is to measure your pet's measurements to determine the size of the door flap you'll need. This will help you design a cat flap hole that is the right size. Outdoor Access Even those with basic DIY skills can manage to install a cat flap on an outside backdoor. This will cut down on the expense and stress of hiring a handyman or carpenter to do the job for you. You can give your cat full access to the garden or patio by installing an animal flap to your bifold door. This will allow you to avoid opening and closing the door. This can reduce behaviour problems like avoidance of litter boxes as well as boredom, destruction and aggression that can occur when a pet is confined indoors for long periods of time. The flap lets cats engage in natural behaviors such as hunting or socializing with other animals. This can enhance their mental and physical well-being. Cat flaps for doors can be fitted to most types of doors. However, the most popular choice is the magnetic cat flap which only opens when it detects the microchip on your pet's collar. This will stop unwanted animals and cats from gaining access to your home. The cat flaps are compatible with uPVC or composite doors. If have a modern set of energy-efficient composite back doors, they are more weatherproof and secure in comparison to uPVC. Modifying them for a pet flap can be somewhat more difficult than modifying the traditional uPVC door. Always go through the instructions included with your cat flap prior to attempting any installation. This will advise you of the exact dimensions for your door and provide an inventory of the