hi ppl, thanx for the advice. For overlaying on marble, cos for the rooms, it is hard on the elderly if they wake up to a cold floor, be it due to low temp at night or aircon. furthermore, we are considering using platform bed, n marble n platform bed dun go together well. For the marble, one told me tht "old" marble will harden over time, so even if u use diamond grind, it will not help.... got such theory? all along thought marble is marble, grind it and it will be fine. yar... interested in relocating the toilet door more to the side so as to have more space for the bed... since i am going to hack off all the toilet wall and floor tiles, I do not understand why i can't relocate the door too, as long as it is not a column. Any idea how much it cost roughly to install a hidden sliding top-hung wooden door? Any advice is welcome.