Nick,
I like your idea of spraying successive layers of PC, a light
insulating layer and a heavy fireproof layer; I might try that. The
only thing that concerns me at all is that most 'normal' houses are
supposedly built with the flammable frame away from fire and such- I
don't know how many times people have looked at me funny when I say I
want to build a nonflammable house. They say wooden houses don't burn
because they're coated with sheet rock inside, and a lot also are
stucco coated outside. Yet the couch catches fire and next thing you
know the house is a pile of ashes. Just being cranky and all, ideally
I'm after something that doesn't burn, smolder, or mold under any
circumstances- whether its a flash flood or lightning strike or the
stucco cracking in a quake and then a fire starts somehow- you know,
that whole 'Murphy's Law' thing. Oddly enough, the whole reason I've
been attracted to alternative building has been that I was fed up with
the so-called safe traditional building, where you lose the whole
thing if it floods because mold grows inside the walls, or the house
catches fire and burns down because its built out of flammable stuff.
Even brick houses usually have wooden rafters and plywood roof
sheathing, so the whole roof system collapses into the house, usually
toppling the walls. Maybe I should make a cast pyrex igloo or
something... (joking).
--- In papercreters@yahoogroups.com, "Nick Boersema" <picknick@...> wrote:
>
>
>
> My concern with building a metal framed structure and coating it in
wire,
> was to find a way
> to trap the wire as part of a structural matrix with the coating. With
> burlap draped over the
> wire with PC blown onto the burlap, the PC might stick to the
burlap, but to
> get the burlap
> then to adhere to the wire seems to me would require a mechanical
bond like
> hog rings
> every several inches or something. Same with the carpet. I was trying to
> emulate
> ferrocement using fiber instead of steel, and quickening the pace of the
> process by being
> able to dip the fiber (burlap) into a slurry and drape it over an
armature
> instead of
> meticulously suture expanded metal lath onto the wire armature. The fact
> that the slurry
> sets up rock hard inside of half an hour also advances the pace of the
> process, as night
> temps are still often below freezing and I didn't want to wait until
later
> in the year to get
> going on the project: freezing while setting up can often ruin
cement based
> curing
> processes.
>
> John what about using your burlcrete as the shell. Then spraying
successive
> layers of papercrete with borax and lime (relatively light high R
value).
> Once you have your R value gradually switch your mix to a heavier mass
> oriented recipe and continue to spray layers or slipform which ever
you find
> easiest. If your light papercrete is sandwiched between a hard
sealed outer
> shell and a heavy almost adobe inner shell how can it smolder much less
> ignite?
>
> Nick
>
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