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Double glazing can be equipped with cat and dog flaps to allow your pets to go and go as they please. They also help in keeping an eye on your pet whilst you are away from home. You can put in the cat flap inside an existing uPVC or double glazing sealed unit. But, you'll require a replacement part that has an opening already made. A glazier can do this using the appropriate equipment and knowledge. Easy to install A cat flap is an excellent option for allowing your pet access to the outside without having to shut and open your do