wildtoad wrote:
Homeowner is at fault for causing the fire albeit accidentally and thus liable for the neighbors damage. The neighbor and their insurance company is right to seek damages from the homeowner. Whether or not op has liability coverage to pay for the neighbors loss is between him and his insurance company.
That is wrong if it was ruled an accident. My neighbor's tree fell on to the roof of our house. His insurance coverage/responsibility ended at the property line. My insurance had to cover the cost to repair our roof and remove the tree on my property.
That is why the OP needs to talk to the State Insurance Commission for guidance.