I have been on the Karndean course and fitted several floors but this one has me stumped as to what to do. I am looking to lay a new Karndean floor on top of an existing karndean tiled floor with same size tiles. What I am looking to find out is how do I go about this? Should I actually lift the entire floor, the tiles and plywood (I laid the original ply with proper staples etc so I know it is correct and safe) and just start again or is it possible to just lay them on top of the existing floor. I dont want to take the lazy option but the room lends itself to laying them on top if this is possible. If I do do that is it a case of having to put a skim coat over the exisitng tiles and them the gluing and tiles on top. Or is it possible to pull up all the tiles at least, then skim coat the floor to even out imperfections on the ply and then lay the tiles. Does skim coating on top of the glue before laying the tiles cause any problems. I also thought of lifting the tiles and if the come up ok maybe just gluing the other tiles with glue on top of glue. I hope that makes sense, I know it will to trained fitters and the experts out there. Any help much appreciated