UPVC door panels offer a long-term alternative to composite doors. They are strong energy efficient and fireproof. In addition, they are inexpensive and easy to maintain. The easiest way to fit an animal flap on a uPVC panel is to order an additional double-glazed sealed unit with a pre-cut hole https://www.repairmywindowsanddoors.co.uk/horndean-cat-flap-installer-near-me/