[Tropo-Bob (Bob)]

Originally Posted by gaseous

Yes Bob, it's called the Bushfire Attack Level (BAL). It's normally part of a local authority's list of planning regulations for houses adjacent to potentially bushfire-prone areas. It ranges from a low-range ember attack to full-on direct flames. The low-range rating requires sealing of gutters/downpipes, mesh screening on windows/doors, non-combustible decking materials (or timbers that meet the BAL requirements), etc. Just complying with the low-level rating can be quite onerous and expensive - I shudder to think what the high level ratings would require.

Thanks for this information. Appreciate it!