https://pediascape.science/wik....i/Why_Install_a_Doub
A cat flap is a great method to allow your pet some freedom and save you the hassle of letting them in and out. It will also make your pet be less stressed and stop them from entering the house when they're not wanted. To place a cat flap in your door you need to measure from the bottom of their stomachs to the floor and draw a line on the door panel. Make use of a spirit-level for checking that the line is straight. 1. The type of door If you're installing a cat flap into an uPVC door panel or a double glazing glass