Any idea the temperature at which this flash would occurr? I would assume you would be very uncomfortable well before the foam would flash.. could be wrong. Anyway, it's probably no more or less safe then a blanket fort... Don't smoke or allow open flame in your yurt. If it catches fire, you have only two ways out. The door, and making a new door. The second option is not really that hard when you're motivated by some nasty flames and vapors. Foam really is just nasty.
Spiral On Tue, Jun 15, 2010 at 2:45 PM, Chris Phoenix <[email protected]> wrote: > I've never seen a flaming tent, but a flaming tent can at least vent > heat to the outside. As I understand it, in foam buildings the heat > simply reflects internally until the whole thing is ablaze very > quickly. > > The open-air fire test you did would be useful for most materials, but > not for foam. The foam is such a good insulator that it makes a huge > difference whether heat can escape from the face (vs. being reflected > back by more foam). > > Firefighters nowadays call it "solid gasoline." > > Chris > > On Tue, Jun 15, 2010 at 11:21 AM, Spiral Syzygy <[email protected]> > wrote: >> 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... >>> >>> -- >>> >>> You received this message because you are subscribed to the Google Groups >>> "hexayurt" group. >>> To post ... >>> >>> -- >>> You received this message because you are subscribed to the Google Groups >>> "hexayurt" group. >>> To post to this group, send email to [email protected]. >>> To unsubscribe from this group, send email to >>> [email protected]. >>> For more options, visit this group at >>> http://groups.google.com/group/hexayurt?hl=en. >>> >> >> -- >> You received this message because you are subscribed to the Google Groups >> "hexayurt" group. >> To post to this group, send email to [email protected]. >> To unsubscribe from this group, send email to >> [email protected]. >> For more options, visit this group at >> http://groups.google.com/group/hexayurt?hl=en. >> >> > > > > -- > Chris Phoenix > [email protected] > 650-776-5195 > > Founder, http://OnePercentGlobal.org > Executive Coach > Director of Research, Center for Responsible Nanotechnology, http://CRNano.org > > -- > You received this message because you are subscribed to the Google Groups > "hexayurt" group. > To post to this group, send email to [email protected]. > To unsubscribe from this group, send email to > [email protected]. > For more options, visit this group at > http://groups.google.com/group/hexayurt?hl=en. > > -- You received this message because you are subscribed to the Google Groups "hexayurt" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/hexayurt?hl=en.
