https://anotepad.com/notes/cwxykwrm
https://blogfreely.net/birthja....pan2/installing-a-ca
https://postheaven.net/skinwin....e2/installing-a-upvc
It is possible to insert a cat flap into an upvc panel or double glazing sealed unit. However, the most effective solution is to put in the glass pane from scratch using a pre-made hole. Read the instructions that should be included in the kit for cat flaps, and follow them with care. Make sure the shape you've drawn (be it circle or square) is accurately depicted on your template drawing. Saf