Bathroom - Cement Backer Board

I want to put Barker tile (Ceramalite)from floor up four feet around my bathroom walls. The carpenter I have hired, wants to cut the Barkertile to fit against the edges of the baseboards and door/window casings instead of putting it on first then putting the baseboards/door/window casings over at least one-half inch of the Barkertile. The Barkertile is patterned to look like four inch tiles with small grout lines slightly indented and is 4X8 sheets. Nothing being perfectly square even though it has just been built, suggests to me that if he does this job as he suggests, he may find a piece of the cut Barkertile resting completely on that section of baseboard but either trying to overlap a door casing or be touching it at the bottom but veering away from the casing as it climbs the four foot stretch up the side of the casing. The carpenter's point is: The Barkertile is going to be stopping midway or so beside the door/window casings and since it has a thickness of one-eighth inch, it would be holding the casing away from the wall that thickness where the Barkertile stops. I think this would work if he was to cut away from the back of the woodwork where the Barkertile will be, a strip one-eighth inch deep by one-half inch wide for the edges of the Barkertile to fit into. This should guarantee that there would be no discrepencies in fitting and the woodwork and would also be supporting the Barkertile from comming loose of its cement at these points. I have foot square ceramic tiles on the floor. Since this is a new bathroom installed on the second storey level of my home, I had the plumber put a drain in the middle of the room for water overflow immergency purpose. The man who laid the tile, first built up around the edge of the room, a foot and a half tapering in from the walls with fast drying cement before he laid the tiles. The thickness of cement is very little at its highest point by the wall, just enough to cause any water overflow from flush etc., to flow toward the middle of the room's drain instead of going out the door or toward the walls of the room. Since the thickness of cement may vary at points along the baseboards, this is where I am concerned that the baseboards may not set square as to the door casings. The walls are gyproc, dry walling has been done and the walls have been primed with sealer/primer paint plus two coats of latex satin (final paint) on top of this. Hopefully I have not missed any details, is there any advice or further instructions you can give me to completing this job of adding the Barker tile sheets to the bottom half of my bathroom walls. Much appreciate your input, Clara G.

I was in the process of replacing my wax gasket on my leaking toilet with a WAX-Free gasket, when I noticed my closet flange was broken. I would like to be able to replace this flange, but it seems as though it is connected to my waste pipe. I followed this pipe bend to the basement and I can't figure out how to seperate this pipe. Is there a way to pull this old flange off from the pipe and put a full new flange on? I unscrewed the 3 screws that seemed to hold it in place, but no luck! Do I have to replace part of the waste pipe? I read about some sort of repair strap called the Gapper Flange Repair Strap, but I do not know if this is the best solution. Thanks in advance!