Termites do not expose themselves. Therefore, if you did not see any termite around, your house has zero termite. You are wrong. You may not immediately see a termites walking around but your house can be infested with termites already. That is very true. And that is a very scary thing to consider because when termites infest your house, your house can weaken fast.
Here is how to kill termites naturally. Use boric acid. Pour in to the affected part. If you are not comfortable with it, ask for help. There are people who can assist you. If you have some extra money, simply hire a professional to do the thing for you.