This is a hard question to ask, because each state has its own rules regards to insurenced assets.
Insurence companies can vary in their coverage regards to property liabilities. Insured risk factors are taken into consideration as well. Myself, I carry an additional unbrella policey just because I live in California, a state where most people scream the word "SUE" if they stub a toe on your sprinkler head adjacent the public sidewalk...
If you are concerned, have your agent perform a reevaluation of your policy.