https://elgaard-henry.blogbright.net/back-door-with-cat-flap-fitted-1727899981 https://articlescad.com/fitting-a-cat-flap-262120.html https://posteezy.com/choosing-cat-flap-insulation-36 Installing a cat flap your door is a relatively simple task. You will need to be aware of a few points prior to getting started. It is possible to install upvc panels with a cat door without having to cut holes in your wall or door. Many glass companies provide them with holes already made to fit an animal-friendly door. 1. Safety Cat flaps made of upvc are simple to install and can be installed to many different types of doors. They are energy efficient and weatherproof and come with draft-proofing built in to help insulate the opening. They are also fire resistant and can be tailored to meet security standards. They are safer than traditional wooden doors since they are less susceptible to warping and rotting. Fitting a cat flap into a uPVC panel or double glazed sealed unit isn't difficult however it is an activity that should be left to a professional. This is due to the cost involved with replacing the whole uPVC unit if you get it wrong. It is also worth remembering that it could void your warranty if attempt to do this yourself. To begin first, ensure you have the right blade in your jigsaw to cut uPVC. It should be a fine cutting blade, typically marked for use with uPVC or metal. Once you have the blade in place, carefully follow the line you've drawn on the door with a pencil to mark the location of the base of the flap section. Mark it twice both vertically and horizontally. It's a great idea to make use of a spirit level in order to ensure that the flap section is level with the edge. This will increase your chances of getting it right the first time. Finally, carefully cut around the line with your Jigsaw. The most important thing to remember when fitting a upvc door panels cat flap is that it needs to be secure, meaning that burglars can't get inside and open the door