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If you are planning to install a cat flap inside your home, it's recommended to hire an expert tradesperson. DIY projects typically result in a poorly-fitted pet flap that allow in drafts and result in higher energy bills. SheffLOCK can install a cat flap on all kinds of doors, including wood, glass, uPVC composite and even on external walls. On average, it takes about 2 hours to install the cat flap. Cost of the pet flap A pet flap is a great way to let your cat leave and come at will. If the flap isn't p