This cat flap that is insulated features a double-flap design and offers a good level of protection for different climates. It can be installed in wood, uPVC, glass, and metal doors. A tightly sealed door is essential, especially in cold weather. It can prevent warm air from being sucked out https://cat-flap-installer11644.bloggazzo.com/30141542/installing-a-cat-flap-in-a-upvc-door-cost