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If you want to install a cat flap inside your home, it is best to hire a professional tradesperson. DIY projects often result in poorly fitted pet flaps that let in draughts or increase energy bills. SheffLOCK can be installed as a cat flap in most kinds of doors like wood composite, uPVC and glass doors as well as exterior walls. It takes around two hours to install a new cat flap. The cost of the pet flap A pet flap is a great method to allow your cat to come and go whenever it wants. However, if the flap isn't properly fitted