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It is recommended to hire an expert to install a cat-flap at your home. DIY projects usually result in poorly-fitted pet flaps that could let in drafts or increase the cost of energy. SheffLOCK can install a cat flap on most kinds of doors, including wood, glass, uPVC composites and even on external walls. It takes about two hours to install the cat flap. Cost of the pet flap A pet flap allows your cat to go and come whenever it pleases. However, if the flap isn't correctly fitted, it could let heat escape fro