https://opensourcebridge.scien....ce/wiki/UPVC_Door_Pa
https://imoodle.win/wiki/Addin....g_a_Composite_Door_C
The process of installing a cat flap may seem intimidating, but it is fairly simple by following the correct instructions. First, determine the height you want the cat flap to be (on average or belly height). Mark this point on your door, and use the template included to guide you when drilling. If you have a young kitten you can prop the door open a bit and gradually allow it to pass through. Reward the kitten as it passes. Take a measurement of the door