https://historydb.date/wiki/Through_Wall_Cat_Flap
uPVC door panels are an alternative for composite doors. They are durable, effective and resistant to fire. Additionally, they are inexpensive and easy to maintain. The easiest way to fit the cat flap onto a uPVC panel is to purchase an additional double-glazed sealed unit with a premade hole for the cat flap. This is much safer than cutting the hole in a glass panel. UPVC Doors are easy to maintain Unlike traditional wooden doors, uPVC doors don't require frequent painting or sanding. They are also energy efficient and help reduce your