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uPVC panels are a long-lasting and long-lasting substitute for composite doors. They are strong energy efficient, durable, and resistant to fire. They are also inexpensive and easy-to-maintain. The most straightforward way to install the cat flap onto a uPVC panel is to order an extra double-glazed sealed unit that has a pre-made hole for the flap. This is safer than cutting a hole through an existing glass panel. UPVC Doors are easy to maintain Unlike traditional wooden doors, uPVC doors don't require frequent painting o