Scope of Coverage under CGL Form

A prospective insured, a scrap dealer, currently is rated (incorrectly, we believe) as an auto dismantler; he also tears down buildings. However, this latter activity is not listed on his policy. The coverage has been renewed four times and the insurer has never been notified of any changes in the operation of the insured company. In fact, we believe the operations of the company have never changed and the insurer was provided incorrect information at the original inception of the policy.

So, we are wondering if coverage would be provided if a claim occurs while the insured is dismantling a building. For example, the insured damages a neighboring property during the work, or a passing pedestrian is injured by falling material. What is your opinion?