Normally I would agree, but I am not sure that applies in the case
of Faswall. It is like the EPS form stuff, using a PC like material
for the EPS component and then rebar enforced 3k PSI cement for
vertical and horizontal stability. Since the cement itself would be
the best thermal mass in this case and it is already completely
enclosed in the PC like material, wouldn't that reduce it's value as
a thermal mass? IE, doesn't the thermal mass need to be able to
easily interact with the interior environment?
- E
--- In papercreters@yahoogroups.com, "ElfNori" <elf@...> wrote:
>
> And if you're wanting to use the wall as thermal mass, put a much
thicker layer on the outside and using something with good thermal
mass on the inside.
>
> ElfN
>
> ----- Original Message -----
> From: Ernie Phelps
> To: papercreters@yahoogroups.com
> Sent: Thursday, November 08, 2007 4:32 AM
> Subject: [papercreters] Re: papercrete on Faswall blocks
>
>
> --- In papercreters@yahoogroups.com, "smarsh54" <brucem@> wrote:
> >
> > Thanks, Ernie.
> >
> > I am not sure about the practicality of using papercrete on
the
> > exterior as the house is in coastal Washington so lots of
moisture.
> > What is the consensus on using papercrete in such areas and
how best
> > to waterproof it while still letting it breathe. What would be
the
> > best recipe for the exterior in such a location?
>
> Apologies, I was not clear in my message. I meant that you
should use
> a thicker coat on the INSIDE of the exterior walls and a thinner
coat
> on the other inside walls, since insulative value has much less
> meaning on a non-exterior wall. I did not mean for you to change
your
> plans, just take it into consideration when planning on room use
and
> space.
>
> If you want to use PC on the exterior, I would recommend a mix
that
> has boron if insects are a problem in your area. I would say a
high
> mineral content mix (clay, pozzolans, portland, lime, etc) would
> generally hold up better in that area. Sealing appropriately
would be
> an important consideration and you should look into a wide
overhang on
> the roof to prevent constant rain exposure. Honestly, I would
want to
> test various mixes on an out-building in your climate before I
would
> just try something on my house exterior.
>
> - E
>
>
>
>
>
>
> -------------------------------------------------------------------
-----------
>
>
> No virus found in this incoming message.
> Checked by AVG Free Edition.
> Version: 7.5.503 / Virus Database: 269.15.24/1115 - Release
Date: 11/7/2007 9:21 AM
>
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