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It is best to hire an expert to install a cat-flap inside your home. DIY projects typically result in a poorly-fitted pet flap that allow in drafts and result in higher energy bills. SheffLOCK is able to put cat flaps on all kinds of doors, including wood, glass, uPVC composite and even exterior walls. It takes approximately 2 hours on average to install the new cat flap. The cost of the pet flap A pet flap allows your cat to go and come whenever it pleases. If the flap is not installed correctly, it could let heat esca