https://yogicentral.science/wi....ki/Using_a_Cat_Flap_
https://selfless.wiki/wiki/Cat...._Flap_Installation_i
https://trade-britanica.trade/....wiki/Adding_a_Cat_Fl
It is possible to put the cat flap inside the door panel made of upvc or double glazing glass sealed unit but the best solution is to buy a new glass pane with an already-made hole. Follow the directions that should be included in the kit for cat flaps, and follow them closely. Make sure the sketch accurately depicts the shape (circle or square). Safety If you have