Just off the phone with RMax. Home Depot does not carry their line of fire retardant panels. They are available through their partner in Sacramento.
That's the good news. The bad news is these panels are between 2 and 3 x's the cost. Phoenix On Feb 10, 2014, at 1:37 AM, Vinay Gupta (Hexayurt Shelter Project) wrote: > > So here's what we've heard, J: when you get a fire in a room insulated with > polyiso, the reflective foil keeps the heat inside, bouncing back and > forwards between the walls, and it gets *really* hot really quickly. Once it > reaches the gasification point of the polyiso sheets (literally the boiling > point of the polyiso boards!) they go up *hard*. > > I suspect in a full sized hexayurt that effect would take a while to build up > and people have to walk a grand total of 10 feet to get out, so it's not > likely a danger to life. But I worry that with a couple of thousand units > deployed, eventually we're going to find this out the hard way. And as we see > more and more large hexayurt complexes - are there adequate fire doors? Are > tight-packed units all going to burn if one goes? > > I worry about these things. > > All hexayurts should at least have a smoke alarm fitted. It's $10 and gives a > real margin of safety. Could we try and get that standardized this year? > > I think a pup hexayurt (remember woody's one sheet design) with a small camp > fire inside would be a pretty good test at reasonable cost. The stuff > certainly doesn't light easily, or I wouldn't have picked it, but law of > large numbers is catching up with us. > > V> > > -- > Vinay Gupta hexay...@gmail.com http://re.silience.com > Free Science and Engineering in the Global Public Interest > UK Cell : +44 (0)7500 895568 Twitter/Skype/Gtalk: hexayurt > "In the midst of winter, I finally learned that there was > in me an invincible summer" - Albert Camus > > > On Mon, Feb 10, 2014 at 3:53 AM, Julie Danger <juliedan...@gmail.com> wrote: > About this fire issue: I've read some craaaaaaazy sounding specs about fires > inside hexayurts possibly reaching a bazillion degrees. Can anyone back this > information up? And, I'm considering a sacrificial research burn at > illumination of a small hexayurt to test this theory-- possibly Monday post > burn, 9 pm, illumination village, bring a lawn chair and some booze. > > > > This from "hexayurt safety information" > Important safety notice. Please do not build hexayurts out of any flammable > material. This goes double for foam! In the past, people have built them from > non-fire rated materials including polyisocyanurate insulation (Tuff-R from > Dow, often sold at Home Depot.) I do not regard that as safe if the building > is exposed to sources of ignition like open flame, or mains electrical > devices. Any non-fire rated substance should not be used for camping, and is > generally suitable only for demonstration purposes. > Although free-standing foam may not burn well, an enclosure made of foam can > burn catastrophically. The foam traps the heat, reflecting it back to the > fire and quickly igniting the entire building. According to this article, > temperatures can reach 10,000 degrees and buildings have literally been blown > apart by the sheer force of the flames. Warehouse-sized buildings can be > fully engulfed in under five minutes. The article is about urethane foam, but > polyisocyanurate will probably behave similarly. > http://static.monolithic.com/foam/fire_hazard/index.html > > Here is some video of a sheet of R-MAX (which is very similar to Tuff-R) > being set on fire. As expected, it does not burn well in open air. However, > this should not give a false sense of security about foam-lined buildings. > Foam manufacturers used to think their foam was "self-extinguishing" - but in > an enclosed space, it is not. > > http://www.youtube.com/view_play_list?p=36DB80EAF1D4161B > > (shot by Arthur Zwern of http://progressivebuildingsolutions.com) > > In addition, bidirectional filament tape has turned out to be very flammable, > and burns hot enough to ignite Tuff-R type insulation. This is a "negative > synergy" - the two materials together are more of a fire risk than either > alone, because the fast-burning tape can ignite the boards. We highly > recommend covering all exposed filament tape with foil tape, which is a few > dollars a roll at Home Depot and similar places. > > http://groups.google.com/group/hexayurt/browse_thread/thread/99fbdd6cf9ddaca8 > has pictures of the test conducted by Spiral which revealed this problem. > Thanks, Spiral! > > Estimation of fire risk for any given situation is a decision that only the > person building the hexayurt can make. I recommend you watch the video, get a > clear sense of what's going on, and make your own judgments. All we do is > make the information available, and you make the decision. Please, put in the > extra work and source the safest possible materials. This is your > responsibility. > > > > > > On Wed, Feb 5, 2014 at 7:09 AM, <hexayurt@googlegroups.com> wrote: > Today's Topic Summary > Group: http://groups.google.com/group/hexayurt/topics > > Bulk purchasing Thermax HD or other fire-safe hexayurt materials [1 Update] > framed hexayurts [1 Update] > Bulk purchasing Thermax HD or other fire-safe hexayurt materials > Lance Culp <lanc...@hotmail.com> Feb 05 12:30AM > > Date: Mon, 3 Feb 2014 23:34:13 -0800 > Subject: Re: [hexayurt] Bulk purchasing Thermax HD or other fire-safe > hexayurt materials > From: neversph...@gmail.com > To: hexayurt@googlegroups.com > > Sound like a plan. Any ballpark idea of what the minimum order would be? > On Feb 1, 2014 8:13 AM, "Richard Ginn" <richardg...@gmail.com> wrote: > > Let's make a list of all the suppliers and what their minimum order is, and > what price breaks we would get at what volumes of purchase. > > > > > > On Sat, Feb 1, 2014 at 9:06 AM, Vinay Gupta (Hexayurt Shelter Project) > <hexay...@gmail.com> wrote: > > > > > They're tougher. > They're not that much more expensive. > They won't catch fire. > I feel like this would be a great year to actually fix the supply chain > issues around Thermax HD (or equivalents from other manufacturers), do a > container load bulk purchase, and start moving people off R-MAX etc. until > there's a comprehensive solution for the fire risk. I really want to solve > this problem before somebody gets hurt. > > > > > http://www.appropedia.org/Hexayurt_Safety_Information > > Vinay > -- > Vinay Gupta > > > > Free Science and Engineering in the Global Public Interest > > > http://bit.ly/gupta_arc - the Gupta State Failure Management Archive > http://bit.ly/gupta_ark - or see it directly on Archive.org > > > > > > http://hexayurt.com - free/open next generation human sheltering > http://hexayurt.com/plan - the whole systems, big picture vision > > > > > > "In the midst of winter, I finally learned that there was in me an invincible > summer" - Albert Camus > > Twitter/Skype/Gizmo/Gtalk/AIM: hexayurt > UK Cell : +44 (0) 7500 895568 / USA VOIP (+1) 775-743-1851 > > > > > > > -- > > You received this message because you are subscribed to the Google Groups > "hexayurt" group. > > To unsubscribe from this group and stop receiving emails from it, send an > email to hexayurt+unsubscr...@googlegroups.com. > > To post to this group, send email to hexayurt@googlegroups.com. > > Visit this group at http://groups.google.com/group/hexayurt. > > For more options, visit https://groups.google.com/groups/opt_out. > > > > > > > > -- > > You received this message because you are subscribed to the Google Groups > "hexayurt" group. > > To unsubscribe from this group and stop receiving emails from it, send an > email to hexayurt+unsubscr...@googlegroups.com. > > To post to this group, send email to hexayurt@googlegroups.com. > > Visit this group at http://groups.google.com/group/hexayurt. > > For more options, visit https://groups.google.com/groups/opt_out. > > > > > > > -- > > You received this message because you are subscribed to the Google Groups > "hexayurt" group. > > To unsubscribe from this group and stop receiving emails from it, send an > email to hexayurt+unsubscr...@googlegroups.com. > > To post to this group, send email to hexayurt@googlegroups.com. > > Visit this group at http://groups.google.com/group/hexayurt. > > For more options, visit https://groups.google.com/groups/opt_out. > > framed hexayurts > dylan toymaker <dylan.toyma...@gmail.com> Feb 04 09:09AM -0800 > > For anyone who wants to use stick framing techniques for hexayurts, > i found a set of metal brackets to make it way easier. > > http://www.strongtie.com/products/DIY/GT2-GT6-GTF.html# > > scroll down to see the full system gallery. > > > Dylan > > > -- > You received this message because you are subscribed to the Google Groups > "hexayurt" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to hexayurt+unsubscr...@googlegroups.com. > To post to this group, send email to hexayurt@googlegroups.com. > Visit this group at http://groups.google.com/group/hexayurt. > For more options, visit https://groups.google.com/groups/opt_out. > > > -- > You received this message because you are subscribed to the Google Groups > "hexayurt" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to hexayurt+unsubscr...@googlegroups.com. > To post to this group, send email to hexayurt@googlegroups.com. > Visit this group at http://groups.google.com/group/hexayurt. > For more options, visit https://groups.google.com/groups/opt_out. > > > -- > You received this message because you are subscribed to the Google Groups > "hexayurt" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to hexayurt+unsubscr...@googlegroups.com. > To post to this group, send email to hexayurt@googlegroups.com. > Visit this group at http://groups.google.com/group/hexayurt. > For more options, visit https://groups.google.com/groups/opt_out. -- You received this message because you are subscribed to the Google Groups "hexayurt" group. 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