In the room with the tile in it, they sealed the slab with membrane. Then they put down a steel L bracket on the floor with the this timber facing the back of the brace/bracket: ---timber---L----tile----. Then they floated the tile area with self leveling concrete to make the tile floor level match the timber floor level so they would both be flush whe finishd. Then they installed the timber, and the tile went in after that.
End result: perfectly flush transition between timber and tile.
Greg
However, I'm really concerned that when I lift the carpet and tiles that the result will be an uneven concrete floor that might not be suitable for floating timber as the tiled area needed to be raised to meet the carpet height maybe... To be honest, I have no idea what to expect, but I guess before reading this I assumed that the tiles and carpet both would be laid just on flat concrete.
I haven't yet decided if I'm going to lift the carpet and tiles myself yet or take the easy road and pay for someone else to, but regardless, what are the chances that the base underneath will be unlevel, and what kind of work would be involved to 'level' it sufficiently for floating floorboards?
Thanks all!