When rennovating or building, the design stage is the best time to specify where you wish your cat or dog door be installed. As once a double glazing panel is manufactured it cannot be cut; and therefore requires replacing in order to fit a pet door. Not getting this right can be expensive.
help you witrh specifying the cat or dog door to suit your pet
provide you with the specifictions that your builder will need
advise a suitable product that will not affect the integrity of your double gass unit
If however you have an existing home with double glazing, there are other options. For example fitting a pet door through a wall. In this situation it is best to to schedule an on site no cost to you consutation and discus options avaliable .