We just had a bathroom floor professionally tiled with 12" tiles. My wife just informed me that the installer didn't user spacers and she isn't as happy as expected because of variations of tile spacing. I haven't seen it yet so I don't know how much variation there is. Do professional installers typically use spacers or not? Also, she isn't happy with the cut on one of the tiles in the corner next to the door. (Tile was done on a diagonal) We can be a bit of perfectionists, so am I out-of-line to complain to the store we hired?

I have seen this on here before, but i have a question i haven't seen answered yet… I have a 1920's house, and i removed 3 layers of flooring and subflooring in my bathroom. i reached hardwood, with remnants of black tar paper on it, and this floor is level with the hardwood outside the bathroom. i have bought durock cement backer board, and plan on using this under the tile. a few questions first… 1) do i need to install some sort of plastic on top of the hardwood to protect against water damage? 2) do i need to remove the hardwood floor or tar residue or can durock go on top? 3) do i need to lay 3/8" mortar underneath durock or can i just screw it to hardwood? 4) do i need to tape/mortar the seams of the durock before laying mortar & tile? 5) does the durock need to lay perpendicular to the hardwood? (bathroom floor is only 4' x 7' so we're talking 3-4 sheets of durock max) 6) will 6" tiles be much less prone to cracking than 12" tiles? thanks for your help! these forums are absolutely great for diy-ers. thanks again!