Can I use non-flammable insulation, like fiberglass? What depth do I need? Must it be fully filled from bottom of truss to underside of roof sheathing? What if the (attic) space is accessible and not used for storage?
I take it the attic area has combustible construction material???
If so has to have fire sprinklers or meet what I call one of the exceptions,
Which is fill with non combustible insulation,,,
From top to bottom, as in completely filled!!!!
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