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It is possible to fit a cat flap in the door panel made of upvc or double glazing glass sealed units but the best solution is to purchase a brand new pane of glass with an already-made hole. Follow the directions that came with the kit. Ensure that the shape drawn (be it circle or square) is accurately depicted on the template. Safety A microchip activated pet door in your door made of upvc is a great solution for those who have a dog or cat and wish to let them out into the garden, but don't want to open the d