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Cat and dog flaps that are installed with double-glazed doors make it easy for your pets to come and go whenever they want. They are also great to keep your pet safe while you are away. You can install the cat flap inside an existing uPVC or double glazing sealed unit. However, you will need a replacement part with an opening that is pre-made. This can be done by a glazier with the appropriate equipment and experience. Easy to install A cat flap is an excellent option for allowing your pet to have f