https://securityholes.science/....wiki/Adding_a_Cat_Fl
Double glazing can be equipped with cat and dog flaps that allow your pet to leave and come as they please. They are also great for keeping an eye on your pet whilst you are away from home. It is possible to install the cat flap onto an existing uPVC panel or double glazing glass sealed unit, but you'll need a replacement piece that has a hole already made. This can be accomplished by a glazier who has the right equipment and training. Easy to install A cat flap installed in your home is a fantastic way to allow