Re:'Most homes' in Lytton destroyed by catastrophic fire, B....
by viraptor on Thursday July 01, 2021 @05:51PM
(#27705347)
Or keep the roof wet. As long as your water supply exists, roof sprinklers work. They're popular in Australia with people living in bushfire prone areas. https://build.com.au/roof-sprinklers
(It also helps that bush properties have large water tanks attached to them)
Re:'Most homes' in Lytton destroyed by catastrophic fire, B....
by Syonyk on Thursday July 01, 2021 @04:55PM
(#27704741)
You don't actually need non-flammable roofing - just a roof rated for the fire type.
Check Class A roof tests. A lot of asphalt shingles, properly installed, actually are Class A fire rated - which is a 12x12 2kg grid.
https://www.builddirect.com/learning-center/building-materia...
Interior corners on the roof or house tend to cause problems, though. Debris builds up and ignites, and just impinges on the siding until you light something behind it.
You can also have firebrands entering through attic vents and bypassing the roof - there are vent types that are resistant to this, but tend to cost a good bit more.
Why we don't do this in urban wildland interfaces... no idea.
Locally, a combination of stucco and concrete tile roofs can make a house basically immune to fire rain--but concrete tile roofs are not an option in most places.