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If you are planning to install an animal flap at your home, it's recommended to work with a professional tradesperson. DIY projects often result in poorly-fitted pet flaps that could allow in draughts or raise energy costs. SheffLOCK can be fitted as a cat flap on all types of doors including wood composite, uPVC and glass doors, as well as external walls. On average, it takes around 2 hours to install the cat flap. Cost of pet flap A pet flap permits your cat to come and go whenever it wishes. If th