https://articlescad.com/cat-fl....ap-installation-cost
Cat flaps allow your pet leave and come at their own pace, without you needing to let him in or out. They also prevent your cat from peeing in the house. It is easier to install the cat flap on a Upvc panel than on a glass one but you'll need some skills and the correct tools. Measure the Door Installing a cat door into the front door is difficult, but as long as the cat flap is the appropriate one and you follow the guidelines you can make it less difficult. We will be showing you how to mark out the shape, using an jigsaw