What should a residential architect be most concerned with? Threats to the home from fire, flood, or wind? The answer: None of the above. Experts say the biggest risk is termites. Especially one spectacularly destructive breed, the Formosan subterranean termite. The Formosan termite is believed to account for 90 percent of all U.S. termite damage, now running in excess of $5 billion annually. The Formosan termite represents a grave problem that pest control specialists have no easy way to combat.