UPVC door panels offer a long-term solution to composite doors. They are strong energy efficient, durable, and resistant to fire. They are also reasonably priced and easy to maintain. The most convenient way to insert a cat flap into a uPVC panel is to purchase an additional double-glazed sealed unit https://www.repairmywindowsanddoors.co.uk/bedford-cat-flap-installer-near-me/