Question for folks who install floor tile:  I am in the process of rebuilding my floors.  I have advanced to the completion of the 3/4 inch plywood subflooring installation.  I would like to install tile at the front door entryway, an area about 4ft x 6ft (small, I know but the total house is 1050 sq.ft.) and I’m considering something like a slate.  From step one, please advise on how to proceed, i.e, should the subfloor be coated with something, should I install something like that very thin cement slabs, what is the best tile/slate/whatever, etc.  I live in Minnesota and sand and grit and salt are the weapons of choice for road traction improvement in the winter.  I’m not concerned about the cost, esp for this small area; I just want the best way to go.  Many thanks.