As a note: the white foil didn't seem particularly reflective in the IR spectrum while the silver side was extremely so. On Jun 10, 2014 5:14 PM, "Adam Bregenzer" <a...@bregenzer.net> wrote:
> We couldn't find anyone who would sell Thermax HD unless we bought Dow's > entire minimum order from them, which is 1,100 sheets. > > The good news is we found an alternative panel, Hunter Xci 286 (link to > specs below). It has the same compressive strength and fire rating as > Thermax HD and is available in smaller quantities, also it's cheaper than > the quoted price for Thermax, but still relatively expensive at ~$33 / > sheet. The foil on both sides is a metal foil. One side is highly > reflective, the other is white. > > > http://www.hunterxci.com/images/submittal_docs/XCI_286_lit.pdf > > > > On Jun 10, 2014 8:50 AM, "Hunter" <neversph...@gmail.com> wrote: > >> After months of searching we found out no one in the bay area will supply >> you with thermax hd (if you were buying less than 150 sheets). We went with >> Hunter xcl (?) which had similar fire properties. >> On Jun 10, 2014 8:40 AM, "Dan March" <dr.dan.ma...@gmail.com> wrote: >> >>> Hey Tim ~ I'm also concerned with safety and look for materials that >>> really do the job well.... and with a safety margin I'm comfortable with. >>> The theoretical fire-related risks in a yurt with aluminized interior >>> surface are scary with the lens effect and other concentrating potentials. >>> Even - or in some hypothetical cases - without the foam board itself >>> catching fire, just having any substantial amount of stuff burning in a >>> heat-concentrating structure can get pretty intense. Thinking of keeping >>> any flames out of there, myself. I like to cook but might have a separate, >>> safer place to do it... also experimenting with more serious electrical >>> power and using non-flame cooking stuffs like induction - which looks >>> amazing btw. >>> >>> It appears to me that a well-constructed H15 (which, to me, means >>> mitered corners - which really improve the integrity of tape joints & >>> carrying through the structural properties of the skin over the foam, and >>> also means well tied down and weak points like doorways reinforced) made => >>> 1.5" thick board should stand up to an acceptably high percentage of >>> possible weather on the playa. I don't think any weight difference is >>> practically significant. I can lift a whole H15 either way if it's a >>> package I can handle. >>> >>> I'm playing with Hexacomb board. It's quite a bit more rigid but needs >>> waterproofing and possibly some help with insulation & reflection. It's >>> pretty light and about half the price of HD. Also playing with hybrid >>> systems - board captured by EMT TinkerToy. Hard to price that kind of >>> stuff though... more of an art statement you live in... >>> >>> Re group buys, Home Depot might special order HD in some quantity, but >>> probably not necessarily a huge amount, so I'm not counting that as much of >>> a barrier. Costs a bit more but like you say... Either way, I can do the >>> kits and accessories. >>> >>> ~ Dan >>> >>> >>> On Mon, Jun 9, 2014 at 9:24 PM, Tim <timcann...@gmail.com> wrote: >>> >>>> We'd be interested in a group order as well. >>>> >>>> I'm somewhat new to yurt building. I've read most of the guides but am >>>> yet to read up on true side-by-side comparisons of each type of material >>>> for playa use. I tend to "buy the best" if that makes sense, so I'm >>>> attracted to HD. That said, is it actually that much better on the playa? >>>> I'm also curious if it weighs much more, considering structural >>>> implications for an H15. Thanks for any insight. Count us in if this *is* >>>> the "best" option for the $$. >>>> >>>> >>>> On Sunday, May 4, 2014 8:00:20 AM UTC-7, BurnerDan wrote: >>>>> >>>>> Safety is an issue. All campers need to be aware of the risks - >>>>> especially of fire - in sleeping in many Playa constructs, but yurts have >>>>> special dangers because of their materials and tightness. >>>>> >>>>> Is there any history of encouraging smoke alarm use and do any/all >>>>> such units remain reliable under Playa conditions? >>>>> >>>>> On Saturday, February 1, 2014 6:06:59 AM UTC-8, Vinay Gupta 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 <http://bit.ly/gupta_arc%20>- 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/d/optout. >>>> >>> >>> -- >>> 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/d/optout. >>> >> -- >> 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/d/optout. >> > -- > 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/d/optout. > -- You received this message because you are subscribed to the Google Groups "hexayurt" group. 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