Trumpy, after reading this post again I would take it that your laws in New Zealand are much more strict than ours in th US. Our laws vary from county to county and even city to city. Most fires aren't taken that seriously unless someone is killed and there is some big news story. I have worked on fire damage jobs where there no investigation at all. They sometimes think it's strange that you want a copy of the Fire Marshal's report for your records. I try to keep record of everything I do and make notes and recommendations on any hazards that I find but it's hard to force owners here to make repairs. I do believe in your philosophy of covering yourself as best you can where ever you are. Most contractors here incorporate and keep very little in any corporate accounts, keep good insuance and hope for the best. I have the added protection of a rabbit's foot.