https://king-wifi.win/wiki/Cat...._Flap_Installation_N
https://sciencewiki.science/wi....ki/Cat_Flap_Installe
A cat flap that is built into the wall allows your pet to go in and out whenever they want. Be careful to not install it too high into the wall. This could lead to energy loss and the possibility of burglars breaking into your home. If you are planning to sell your home in the near future having a hole in a cavity wall could be an issue for prospective buyers. Glass cat doors are a safer alternative. Easy to install A wall-to-wall cat flap is a great option to all