UPVC panels are a durable and long-lasting alternative to composite doors. They are durable, efficient and fireproof. They are also inexpensive and easy-to-maintain. The easiest way to fit an animal flap on a uPVC panel is to purchase an extra double-glazed sealed unit with a premade hole for the cat https://www.repairmywindowsanddoors.co.uk/hillingdon-cat-flap-installer-near-me/