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Cat and dog flaps installed in double glazing allow your pets to come and go whenever they want. They are also great for keeping an eye on your pet when you are away from home. You can install a cat flap in an existing uPVC or double glazing sealed unit. But, 'll require a replacement part that has an opening that is pre-made. This can be done by a glazier who has the proper equipment and skills. Easy to install A cat flap installed in your home is a great way to allow your pet free access to the outdoors without having you