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uPVC panels are a strong and long-lasting substitute for composite doors. They are durable, efficient and resistant to fire. They are also reasonably priced and easy-to-maintain. Ordering a double-glazed sealed unit that has an opening already cut for the cat flap is the simplest method to install the cat flap on a uPVC sheet. This is much more secure than cutting the hole in 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 energy-efficient