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It is best to employ an expert to install a cat-flap in your home. DIY jobs usually result in a poorly-fitted pet flap which allow drafts and cause higher energy bills. SheffLOCK can fit a cat flap on all kinds of doors like wood composite, uPVC and glass doors, as well as external walls. On average, it takes about 2 hours to install the cat flap. Pet flaps cost money A pet flap allows your cat to go and come whenever it pleases. If the flap isn't installed correctly, it could let heat escape from your h