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If you are planning to install a cat flap in your home, it is recommended to work with a professional tradesperson. DIY projects usually result in a poorly-fitted pet flap which allow draughts and lead to higher energy bills. SheffLOCK can be fitted as a cat flap on all kinds of doors, including wood, uPVC, composite and glass doors, as well as external walls. It takes about 2 hours to install a new cat flap. Cost of pet flap A pet flap permits your cat to move around whenever it wishes. If the flap isn't properly installe