Hello Yeo, basically termite treatment is abit bull****, they cover warrenty prevention of termite from your SOIL only.
Termite only have 2 way of invading your home, first type is the flying one( fly to your balcony then shed his wing)
2nd type is the normal type, crawling type either from your LEAD IN pipe or from your neighbour roof.
Your 10year warrenty does not cover this above 2.
In short, just do exposed area with soil is sufficient.