Hey, so, for Playa use, the blue board / pink board has a bunch of issues - outgassing, flammability, and the boards typically ship with a lot of curve on them which makes them a nightmare to make hexayurts out of. And tape doesn't stick to them.
Under concrete, though, I think they'd be just fine. You could go with either one, probably, but it would be well worth asking the Ferrocement gurus what they do about foam, because they do use it as a framework sometimes, and they know that process inside and out. Good luck! Vinay PS: thanks for asking on the list so it goes in the archives. That's a damn useful habit. Sorry for the brief reply, V> On Wed, Aug 3, 2011 at 2:07 AM, ken winston caine < [email protected]> wrote: > Couple questions: > > 1. Please remind me of why (other than environmental toxicity and > flammability) early on you rejected using the 2" thick white (EPS) > polystyrene foam boards in favor of the polyiso foamboards? > > > 2. If your only choices -- as are mine locally -- are between EPS and XPS, > which would you choose and why? (As in > > http://www.homedepot.com/h_d1/N-5yc1v/R-202090328/h_d2/ProductDisplay?langId=-1&storeId=10051&catalogId=10053 > vs. > > http://www.homedepot.com/h_d1/N-5yc1v/R-100320352/h_d2/ProductDisplay?langId=-1&storeId=10051&catalogId=10053 > , > for instance. > > 3. Was an argument against EPS its lack of rigidity? > > 3. Was it water permeability? I understand that the EPS styro sops it up > (and loses insulating ability in the process) and that XPS doesn't. > > 4. If you were going to throw up a quickie small building and would be > encasing the foam boards in fidobe papercrete and a fibrous-cement-like > shell in and out, would you still rule out the less expensive white styro > boards for the initial building? Or would you forgo foam altogether? > > Thanks, > ken winston caine > > > -- > 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. > > -- Vinay Gupta Free Science and Engineering in the Global Public Interest 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 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.
