https://menwiki.men/wiki/Using...._a_Cat_Flap_in_Bifol
A upvc panel with an animal flap can help reduce draughts within your home. By keeping your pets in and cold air out you will reduce heating costs. It is possible to install an opening for a cat flap in the upvc panels as well as double glazing glass sealed units however it is more difficult than for timber doors. This is because upvc comes in different thicknesses. Benefits A cat flap that is installed on your door will allow you to keep your pet inside or outside the home, while let other people in. It also keeps out any stray