One of the most common questions we receive from our customers is "Can boric acid be use on timber to guard against termites"? I didn't have a definitive answer so I thought I'd do some research.
There are a literally hundreds of guides on the Internet which all sort of say the same thing. It's all quite confusing.
But essentially you mix up a boric acid solution and apply it to the wood. This would essentially kill off any would be trouble makers. But something about that really concerned me.
The termites have to actually eat the wood to get the boric acid.