I am now working on tiling an add on room with a concrete floor that adjoins the kitchen with an 8 ft wide opening. I have already removed the carpeting and cleaned all the glue from the cement floor, making the wood kitchen floor with CBU and ceramic tile approximately one inch higher than the room we are planning to tile. I would like to get rid of this possible tripping problem and make some sort of a threshold ramp. I had thought about a marble threshold, but have been unable to find one that fits without special ordering and they want to do the job for me. I know 200.00 may not seem like that much to some,but I am unwilling to pay it. I also thought about building up the cement and making my own small ramp and tile over. Is this feasible? Would you use regular concrete or is there something better? Any suggestions would really be apprciated as I want to start on this tile asap. Don't really want to use a metal or wood threshold if I don't have to. But, I do want it to look like a professional job if possible.