https://trade-britanica.trade/....wiki/Cat_Flap_Fitter
uPVC panels are a long-lasting and long-lasting substitute for composite doors. They are durable energy efficient, durable, and fireproof. In addition, they are cost-effective and easy to maintain. The most convenient way to insert a cat flap into a uPVC panel is to buy a replacement double glazed sealed unit with a premade hole for the cat flap. This is safer than cutting a hole into an existing glass panel. UPVC Doors are easy to maintain Unlike traditional wooden doors, uPVC doors don't require frequent painting or sanding.