I have been in Tucson for a few days, as one of our back patios has been demolished and a new patio is taking shape. The tree in the middle of the patio had cracked the old patio in too many places. The demolition was a little more involved than we had hoped, but after two days of jackhammering, out with the old! They have brought in sand and brick have been delivered. The new patio will have a much larger well around the tree with brick laid in sand.