https://squareblogs.net/lyricq....uince00/cat-flap-fit
https://output.jsbin.com/pidigaliga/
It's much easier than you think to set up a cat flap in the solid uPVC panel or sealed double glazed unit. However, if you don't have the appropriate equipment or know-how, you'll require the help of an expert. Learn how to measure, mark and cut the area in the uPVC panel to make your cat flap. Also, how to make the flap weather and draft-proof. Safety A upvc panel that has the flap for cats is a great solution to ensure your pet's safety while still allowing him or her to move around free