https://notes.io/w5UGL
https://squareblogs.net/ranged....omain18/fitting-a-ca
uPVC panels are a strong and long-lasting alternative to composite doors. They are durable, efficient and fireproof. They are also inexpensive and easy to maintain. The most convenient way to insert an animal flap on a uPVC panel is to purchase an extra double-glazed sealed unit with a pre-cut hole for the cat flap. This is much more secure than trying to cut a hole in a glass panel. UPVC doors are easy to maintain Unlike traditional wooden doors, uPVC doors don't require frequent paint