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uPVC panels are a long-lasting and long-lasting alternative to composite doors. They are durable energy efficient and fireproof. They are also inexpensive and easy-to-maintain. The most convenient way to insert the cat flap onto a uPVC panel is to order a replacement double glazed sealed unit with a pre-cut hole for the flap. This is more secure than cutting a hole into an existing glass panel. UPVC doors are easy to maintain Unlike traditional wooden doors, uPVC doors don't require frequent painting or sanding. They are also e