https://menwiki.men/wiki/Fitti....ng_Cat_Flap_in_UPVC_
A upvc-clad panel with a cat flap can minimize draughts in your home. You can save money by keeping your pets inside and letting the cold air out. While it is possible to install a cat flap into both upvc and double glazing sealed units, it is more difficult than installing doors made of wood. This is because upvc comes in different thicknesses. Benefits A cat flap installed on your door allows you to keep your pet inside or out of the house, while still allowing other people in. It also keeps out any stray cats or other unwa