The underfloor space of a house seems like a convenient place to store items out of the weather.
The more space the bigger the items.
Often it’s permanent storage for camping gear, kayaks, building materials and so on.
Wind driven embers will ignite this dry fuel leading to the almost certain destruction of your home.
Fibreglass items and densely packed materials will provide a long lasting flame and devastating heat source.
The best designed houses are simply not designed to handle the types of fuel loads that are possible to store under them.
So don't do it, unless the subfloor space is fully enclosed and ember tight to the same standard as your living area.
This means a carefully vented space using non-flammable materials and wire mesh no greater than 2mm that deny embers to enter.
