Double glazing can be fitted with cat and dog flaps to let your pet leave and come whenever they want. They are also great to keep your pet's attention when you are away. It is possible to fit a cat flap inside an existing uPVC panel or double glazing glass https://catflapinstallersnearme71308.blogs-service.com/61768524/installing-a-cat-flap-in-a-upvc-door-cost