carpetflooringlayouttile
I have 2 rooms planned, one will be tiled and the other will be carpeted with a door opening between them. Where should the tile stop and the carpet begin? In the figure below I have 3 different locations, I think the middle of the door opening, but not sure. The door opening is standard 2×4 wall between the rooms.
Figure 1 – Sample visual with possible locations.
Assuming you want to do this right and don't mind a little elbow grease.
Remove the ceramic tile, and strip the floor down to the bare concrete. Technically you don't have to do this, but not doing it is, IMO, just lazy. Building up the floor is convenient but not the best work you can do.
Now that you're down to bare concrete, install Dri-Core tiles or something similar for subflooring, making sure you add ventilation as per manufacturer instructions. This product protects itself from moisture (except in a flood of course) and will likewise protect the tile from small moisture accumulations.
There are a number of interlocking carpet tile products available that allow you to do a floating style installation.
The grout question is a non issue if you remove the ceramic, as you should.
A usual method is to go down the edge of the wall with a surface bullnose, showing a "knife edge" at the corner. This means the tile rolls down to meet the corner.
Another method, if your bullnose has finished bottoms, is to overlap the edge and go "around the corner", having the bullnose round into the outside wall (the wall that has the striped wallpaper) The bullnose will hide the tile edge, putting that grout line facing the side of the entrance.
This photo shows both methods: the left with a flat-on-wall knife edge and the right shows a wrap-around-the corner
You can use the edge profile pictured, in place of surface bullnose. You would adjust your tile to end short of the corner (equal to the edge thickness of the profile.
In all cases, grout would be filled into the corner/wall junction.
Best Answer
If there's a door, under the door, directly.
Otherwise, either dead center or even with one edge or the other. If there's no door, I'd say bring the carpet up to the edge of the tile, rather than cutting the tile to meet in the middle.
That said - it's a purely aesthetic choice.