• Top Causes of Loss The form is one of three Office, Inc. insurance services. (ISO), forms of commercial property insurance causes loss. The loss cause forms establish and define the cause of the loss (or hazard) for which coverage is provided. The Root Causes of Loss form (CP 10 10) covers the following named hazards: fire, lightning, explosion, smoke, storm, hail, riot, civil unrest, aircraft, vehicles, vandalism, sprinkler leakage, crater collapse, and volcanic eruption. action. Two other loss form causes are general loss form causes (CP 10 20) and specific loss form causes (CP 10 30).