This is the language I cut and copied from my insurance policy. It's very very expensive to have earthquake insurance. I would say 90% of the homes out here don't have it. Also it's only offered through a government program. Not to mention how could it be my fault if my deck got jacked up in an earthquake?
This is a page everybody signs with one of my contracts. You would be surprised at how many people smile and say, of course it won't be your fault, and sign it. However if there's ever an earthquake and someone's on one of my decks and gets injured, you can bet they're going to be looking at me. I always tell them if they want to be better informed about their soil and seismic conditions we can always hire an engineer to go above and beyond what is typically required. They always refuse.