It is recommended to hire an expert to install a cat-flap in your home. DIY projects usually result in poorly fitted pet flaps that could allow in draughts or raise energy costs. SheffLOCK can fit the cat flap into all kinds of doors, including wood composite, uPVC, composite, glass doors https://cat-flap-installer56838.ssnblog.com/30152315/using-a-cat-flap-in-bifold-doors