Termite pre-treatment to new structures is one of the things that everybody should do. It is so cheap, and so effective, when you compare it to post construction treatments, but you’d be surprised as to how few buildings are actually pre-treated. Wise and savvy architects always specify pre-treatment, knowledgeable builders include it in every structure they erect, and prospective buyers should demand it for any new house they buy or build.
Termite Pre-treatment is far better than post treatment. Post treatment (after you get termites) is actually a “spot” treatment. You can drill a thousand holes, but there will still be places you can’t reach, no matter how hard the exterminator tries. With a proper pre-treatment, the soil next to the foundations is treated with a termiticide and is sealed in after the foundations are in place.
Properly treated structures are sometimes able to resist termites for a much longer period of time, and termiticides applied during construction are generally applied to areas that are unavailable after construction is complete. This one fact would tend to make pre-treatments preferable to post treatments.