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Cat and dog flaps installed in double-glazed units makes it simple for your pets to move around whenever they like. They also help in keeping an eye on your pet when you are away from home. You can put in a cat flap into an existing uPVC or double glazing sealed unit. But, you'll require a replacement part that has an opening already made. A glazier is able to do this with the proper equipment and training. Easy to install A cat flap is a great alternative to allow your pet to have access to the outside wit