https://sciencewiki.science/wi....ki/Fitting_Cat_Flap_
Double glazing can be fitted with dog and cat flaps that allow your pet to go and go whenever they want. They also help in keeping an eye on your pet whilst you are away from home. It is possible to fit the cat flap onto an existing uPVC panel or double glazing glass sealed unit, but you will need a replacement piece that has a hole already made. This can be accomplished by a glazier who has the appropriate equipment and experience. Easy to install A cat flap is an excellent option to allow your pet access to the outd