--- 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
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