The current hexayurt design with foam is cool, for numerous reasons,
fire safety is not one of them. I can't imagine it being too much
worse than being in a flaming tent, except for maybe a false sense of
security with internal fires. It is hard to ignite the foam with a
flame and it doesn't spread much, but I only performed open-air fire
tests. If what Chris says is true, we should consider other materials
if possible or do as we have done in the past and maintaned a strick
to smoking/open flame rule in the hexayurt.

Spiral

On Tue, Jun 15, 2010 at 1:13 PM, Chris Phoenix <[email protected]> wrote:
> The fire risk of foam is not so much from flame sources outside the
> hexayurt, as from flame in an enclosed foam-faced space. Apparently the foam
> is such a good insulator that the space will "flash over" in just a few
> seconds.
>
> Open-air tests of foam flammability do not show what will happen in an
> enclosed foam-faced space. They used to think foam was fireproof. Then they
> lost a few buildings.
>
> Foil-faced foam shouldn't have quite the same problem, though I'd still
> worry about the reflected heat accelerating the combustion of any flammable
> stuff inside.
>
> Chris
>
> On Jun 15, 2010 9:23 AM, "Spiral Syzygy" <[email protected]> wrote:
>
> Yay, I Iove when people build hexayurts in my back yard, and I don't
> have to do anything but watch and heckle. It looks great guys. I can't
> wait to see it on the ranch.
>
> Spiral
>
> On Tue, Jun 15, 2010 at 11:10 AM, Kathleen Ellis <[email protected]> wrote:
>>
>> We've just prefabbed a S...
>
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