Comment by Syonyk
1 day ago
You say that... but a well built log cabin, with a Class A fire resistant roof, is rather likely to survive a wildfire unbothered if the ground a couple feet around it is kept cleared.
They're simple (not a lot of corners for burning things to wedge in), they tend very well sealed with smaller windows (so less chance of a window breaking and allowing embers in), and the amount of thermal energy it takes to light a full log on fire is quite high. Radiant heat from a forest fire isn't going to bother a log cabin. It might darken the wood somewhat, but it won't light smooth logs on fire. Even random firebrands and such lack the energy to bother wood.
The only concern would be a shake roof - that would catch fire easily and burn the place down. But a well built and "tight" roof (no massive eaves with vents into an attic, just minimal overhangs) of Class A fire resistance would work just fine.
Metal roofing is not inherently fire resistant, either - it depends on the materials, and what's below it. Some metal roofing can transfer enough heat to the wood below to light that on fire, even without direct flame spread. And, non-intuitively, a lot of asphalt shingles are Class A fire resistant when properly installed.
What doesn't work well, obviously, are the sort of expensive homes with "all the architectural features," lots of inside corners that trap debris, and an incredibly complex roofline.
People forget that you don't have to modify a McMansion to whatever requirements you're adding - you can build something entirely different.
"Earthships" or other hobbit-hole like houses are almost completely fireproof as long as the entries are handled correctly - anything that can start a fire through three feet of earth is probably a volcano anyway.
Don't most of those suffer from serious ongoing humidity problems? I've looked into that style of housing in the past, and it seems like it's always having issues with mold, mildew, and ohter "issues of running 90-100% interior humidity for long periods of time" sort of problems. I think they're okay in drier climates - IIRC they were developed in New Mexico, which is "bone dry nine months of the year, and somewhat drier the other three."
They do - and there are ways to counteract it (the usual problem is similar to damp basements compounded by the lack of air movement and humidity control).
It’s a matter of cost (it’s almost never worth it) and tradeoffs.
But if fire survivability is paramount, it is an option.