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It is recommended to hire an expert to install a cat flap inside your home. DIY projects usually result in poorly fitted pet flaps that allow in draughts and lead to more energy costs. SheffLOCK is able to put cat flaps on all types of doors, including wood, glass, uPVC composites and even external walls. It takes approximately 2 hours on average to install the new cat flap. Pet flaps cost money A pet flap permits your cat to come and go whenever it pleases. If the flap isn't installed correctly, it could allow heat to escape from y