https://www.openlearning.com/u..../olssonhumphries-slv
https://blogfreely.net/sneezer....eward90/doors-with-c
Installing a cat flap on solid uPVC door panels or double glazed sealed units is much simpler than it may sound. However, if you don't have the right tools or experience you will need to employ professionals. This guide will teach you how to mark the measurement, cut and mark the cat flap area of the uPVC panel. Additionally, learn how to make it weather and draft resistant. Safety A door made of upvc with a cat flap is an excellent method