https://dokuwiki.stream/wiki/Through_Wall_Cat_Flap
Professionals should handle the installation of a cat flap onto your door panel. The doors usually have the plastic exterior, which is thin and flimsy, and then joined to a soft, insulation polystyrene core. These materials can be difficult to cut. It's a lot easier to put the cat flap inside an existing pane of glass, or have a new door manufactured with the hole already prepared. A glass glazier can help you. Easy to install If you have a cat and want to allow them to enter and exit without leaving your home, upvc door panels are a g