http://brewwiki.win/wiki/Post:....Cat_Flap_Installatio
A cat flap is a great way to give your pet the freedom to roam and ease the burden of letting them in and out. It can also help your pet to feel less stressed and prevent them from escaping the house when they're not wanted. To set up a cat flap, measure the distance from the bottom of the cat's stomach to the floor. Draw a line along the door's panel. Use a spirit-level to check whether the line is straight. 1. The kind of door It is recommended to speak with an expert if you are planning to install a cat flap in a uPVC