I had a wood fence built last year, the code calls for 4x4 PT posts embedded in concrete 12" deep, which is what I did. I have always wondered how long this PT post would last in the hot and humid Miami sun and rain.
A few days ago I drove by a house where they just had a new wood fence up. I noticed the bottom of the fence post where it meets the ground all of the post had been painted with something black with the consistency and texture of tar. I am pretty sure this is something done to prevent the post from getting in contact of water. Wish I had thought of that, and curious if this is a common procedure. I hope my posts will give me at least 5 years before I have to do it all over again.
MC