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https://writeablog.net/newsspy....2/fitting-cat-flap-i
This double-flap cat flap that is insulated offers good protection in different climates. It can be installed in wood, uPVC and glass doors. A tightly sealing door is crucial, particularly in cold weather. It can prevent warm air from getting sucked out and cold air getting in which can save you money on energy costs. Wind Resistance A cat flap cover for winter can help keep your home warmer by blocking cold air from entering and keeping warm air in