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It is possible to insert a cat flap into a upvc panel or a double glazing sealed unit. The best solution is to put in the glass pane from scratch using a hole that is already made. Follow the directions that should be included with the kit for cat flaps, and follow them carefully. Ensure that the shape drawn (be it a square or circle) is accurately represented on the template. Safety A microchip activated pet door in your upvc door is a fantastic option if you have a dog or cat and would like to let them out into