If you are planning to install an animal flap at your home, it's recommended to employ a professional tradesperson. DIY projects often result in poorly fitted pet flaps that can let in drafts or increase energy bills. SheffLOCK can install cat flaps on all kinds of doors, such as wood, https://cat-flap-in-upvc-door-pan10985.blogproducer.com/37385204/using-a-cat-flap-in-bifold-doors