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Cat and dog flaps that are installed in double-glazed units makes it simple for your pets to come and go whenever they want. These are also great to keep your pet's attention when you are away. You can install a cat flap in an existing uPVC or double glazing sealed unit. However, you'll need a replacement part with an opening that is pre-made. A glazier can accomplish this with the right equipment and knowledge. Easy to install Having a cat flap in your home is a great way to allow your pet free access to the outdoors without hav