https://imoodle.win/wiki/The_Benefits_of_Cat_Flaps
uPVC door panels provide an alternative for composite doors. They are durable, effective and resistant to fire. They are also inexpensive and easy to maintain. The most convenient way to insert the cat flap onto a uPVC panel is to purchase an additional double-glazed sealed unit with a pre-cut hole for the cat flap. This is much safer than cutting the hole in an existing 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