https://clinfowiki.win/wiki/Post:How_to_Install_a_Cat_Flap The freedom to let your cat go in and out of the house at will is a great way to keep your pet active and mentally stimulated. A flap can help reduce accidents with toilets by making it easier for the cat to leave the home when required. Take a look at the Door A cat flap allows your pet to move around as they want without having to open the door. This makes it ideal for keeping them in when you're home or away and helps keep unwanted pests from the house as well! It is important to measure the door prior to when you purchase a cat flap as there are various sizes available. You can then ensure that the cat flap is the right size for your upvc doors. In the event that it is not, it could be too large or small, and your cat could be unable to use it. Before you do anything but take a ruler and determine the length of the door in various places along its edges. Also, take measurements of the door's height in a few spots. A door that is too tall will make your cat do a gymnast routine every time it is tempted to use the flap. Get help from a glazier in case you're not sure what to measure for the door. They'll be able help you determine whether or not your door is suitable for a cat flap and help you decide on the best size of flap to purchase. Once you've got your measurements, the next step to do is to mark out the shape of the hole on the door. This will aid you when you're cutting the hole and save you money! You must also ensure that the hole you're creating is in the right place. If you're fitting a cat flap to a patio door it is important that the hole does not be too close to hinges. This could result in leakage or problems with the seal. If you have glass doors, it might be best to delegate this task to a professional glazier. It can be a challenge to install a cat flap inside an existing pane of glass, and you may find that the process causes it to crack and lose its weatherproof seal. Measure the Cat