https://yamcode.com/adding-a-cat-flap-to-your-bifold-doors-84 https://click4r.com/posts/g/18415759/get-a-upvc-door-panel-with-cat-flap-fitted Install an animal flap if you want your pet to be able to leave and come back whenever they want without having to open the front door. You should employ an expert to install the cat flap. They are able to handle the complexity of fitting different kinds of cat flaps to different doors and walls. Installation A cat flap allows your pet to enter and exit the house as they please without having to open the door or window for them. There are a variety of pet flaps to choose from including microchip-reading and bite-proof doors to fully insulated cats flaps. These come with a variety of different frames and materials, from plastic or PVC to aluminum and stainless steel. The frame you choose will affect the cost. Aluminum or stainless steel frames are more durable and last longer than plastic or PVC frames. When you are choosing a frame to use for your cat's flap, it is important to consider the type of access you want to grant. If you want to restrict access to your pets, go for a pet flap that is locked. They make use of your pet's infrared microchip to allow them in. They are more expensive than standard pet doors, but they're worth the extra cost to ensure your pet's safety. The next step is to decide what type of wall or door you want the flap installed in. They are typically installed in doors. However they can also be fitted in windows and walls. The best way to finish the job is to work with an expert. They'll have the equipment and experience necessary to ensure that your pet's flap is properly installed. Many homeowners will attempt to install a cat flap themselves however this could be dangerous and lead to costly repairs later on. It's also possible that they will damage the surface of the door or uPVC panel they're trying to fit the flap on. It's generally more cost-effective hiring a tradesperson complete the task to