Problem with home done remedies is exactly that.
I've tried permetherin, creasote, borax and a number of other fairly nasty chemicals in putting down "barrier" systems and found that they don't work.
One Must kill the nest.
I sold a rental property (that I'd called "The Termite Mound" and considered to be "land value only") to a close friend of person that runs the pest control company that I nowuse (It's a small town and who you know still counts for something here).
That property made it into their product demonstration guide, as a success story.
Shortly after that I hired them to get rid of the termites that had eaten parts of the house I live in. now 36 or so months down the track, there's not a termite anywhere near the house.
It's well worth the grand or so per year for regular maintenance, monitoring and baiting (if there's ever a recurrence). Far better and cheaper than having to remedy termite damage.