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https://www.openlearning.com/u..../cummingsfrederiksen
uPVC door panels are a long-term solution to composite doors. They are strong, durable and fireproof. Additionally, they are affordable and easy to maintain. The most straightforward way to install an animal flap on a uPVC panel is to order a replacement double glazed sealed unit that has a pre-made hole for the cat flap. This is much safer than cutting the hole in a glass panel. UPVC doors are easy to maintain Unlike trad