https://securityholes.science/....wiki/Cat_Flap_Instal
The addition of a cat flap to your door panel is an important task that should be carried out by an expert. These doors typically consist of a flimsy plastic exterior that is bonded to a soft insulation polystyrene core. These materials are often difficult to cut. It is a lot easier to put the cat flap inside an existing glass pane, or have the hole prepared in a door. A Glazier can do this for you. Easy to Fit If you have a cat and want to allow them to enter and exit without having to leave your home, upvc door panels are