https://sciencewiki.science/wi....ki/Choosing_Cat_Flap
The addition of a cat flap to your door panel is an essential task that should be carried out by an expert. These doors typically consist of an ungainly plastic exterior that is joined to a soft, insulating polystyrene core. It can be difficult to cut through these materials. It's a lot easier to put the cat flap inside an existing glass pane, or have a new door manufactured with the hole already prepared. A glazier can be capable of doing this for you. Easy to Fit Upvc door panels can be an ideal option if have a pet cat an