https://zenwriting.net/gallonc....oach7/how-much-to-in
Cat and dog flaps that are installed in double-glazed units makes it simple for your pets to come and go whenever they want. They also help in 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, however you'll need to replace the piece with a hole that is pre-made. A glazier can accomplish this with the right equipment and training. Easy to install A cat flap is a great option to allow your pet to have access to