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Cat and dog flaps installed in double-glazed units make it easy for your pets to come and go as they please. They are also great for keeping an eye on your pet whilst you are away from home. It is possible to fit the cat flap onto an existing uPVC panel or double glazing glass sealed unit, but you will need a replacement piece with a hole that is pre-made. A glazier can do this with the right equipment and the right training. Easy to install A cat flap is a great option to allow your pet to have access to the outdoors without having to open and clos