Hi All If the link to my photo does not work here it is: https://photos.app.goo.gl/u2is6g1PtSpRvV2u6 The mosaic tiles I'm thinking of using are https://www.toppstiles.co.uk/tprod42210/victorian-black-white-corner-tile.html From what I have read I think I need to add an intermediate substrate to the wooden floorboard, what should that be? Should I also ensure no tile is bonded to each side of the joint line? Should that joint line contain grout or mastic? Any recommendations on the self-levelling product for this job?