https://telegra.ph/Installing-....a-Cat-Flap-in-a-UPVC
Cat flaps are a great option to allow your pet to move around at their own pace. You can opt for a lockable flap to stop other animals and cats from entering your home. You can install an animal flap inside a bifold door, as it is composed of toughened glass and the frame is not damaged or rotten. The procedure is similar to installing one on an old wooden door or uPVC. Easy to install The addition of a cat flap to your bifold doors will allow your pet to go in and out of the house without hassle, and without having