If you're planning to install a pet flap in your uPVC door or glass panel, then you'll need the assistance of a skilled cat flap fitting expert. They can also assist you with more advanced models like microchip pet flaps. DIY efforts to put in a pet flap often fail https://catflapinstaller37741.blogofoto.com/61894259/adding-a-cat-flap-to-your-bifold-doors