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It is best to hire an professional to install a cat-flap in your home. DIY jobs usually result in poorly-fitted pet flaps, which can let in draughts and lead to more energy costs. SheffLOCK is able to install a cat flap on all kinds of doors, including wood, uPVC composite, glass and even external walls. It takes approximately 2 hours to put up a new cat flap. Pet flaps cost money A pet flap permits your cat to go and come whenever it pleases. However, if the flap isn't properly installed, it could allow heat escape from y