Most existing french doors are suitable to have built in blinds retrofitted, it is a simple process of removing the existing sealed glass units, which is done safely and without causing any damage by our expert installers, and then replacing those with our new sealed glass units with built in blinds, which come with a full 10-year warranty. If you are unsure as to whether or not your existing french doors are suitable to have built in blinds retrofitted, then please contact us today and our friendly team of experts will ask the right questions in order to ascertain whether or not your current doors are suitable. We also offer free surveys whereby our professional surveyors will come down to confirm the accurate glazing sizes of your existing sealed units, as well as to ascertain the current thickness of your sealed units – which will verify whether or not they are suitable to have our built in blinds retrofitted.