https://posteezy.com/cat-flap-....installation-how-fit
Double glazing can be fitted with dog and cat flaps to let your pet go and go as they please. They are also great for keeping an eye on your pet when you are away from your home. It is possible to put the cat flap onto an existing uPVC panel or double glazing glass sealed unit, but you will need a replacement piece with a premade hole. A glazier is able to do this using the appropriate equipment and training. Easy to install Having a cat flap in your home is a great way to give your pet access to the outdoors without