[papercreters] Exterior covering (render)

Clyde  you have far more experience building papercrete walls than me, are you in a dry area?

Simon, thanks for  your comments.  In the US nobody seems to use the word 'render'. but papercrete doesn't need to  breathe-- it needs not to get wet and stay wet.

I'm in a very wet PacNW climate with fog more than sun and water is the enemy to building materials.

In comparing lime plaster to cement plaster the problem with cement is it holds the water a long time, in strawbale homes ( or cob, other)  the water  can soak into the bales and start rot before the cement dries out.  With lime it allows water to stay within the exterior plaster, then quickly wicks moisture away. 

that said a cement has 3000psi and can stand on its own once cured, where lime takes a long time to fully cure (especially if applied thick)  where cement will cure fast.  we like speed in our culture.

 using   paint  may be the best/fastest/cheapest way to quickly protect the papercrete against weather.
I think  the original papaercrete wall  Eric Peterson built  was only coated with layers of latex paint, and it held up ( still is prolly) for a decade

 so wide variety of 'protective' coatings for various reasons of use.

and on top of that there is a dome home in OR, walls a foot+ thick, for mass, but inspectors forced owner to apply a blue foam insulation over that, then he had to affix a metal mesh to hold the gunnite concrete layer that covered the blue foam.  the house was fine as it was, with  in floor heat system, S facing windows, etc, but the rules said he had to use the foam too.  It added  many thousands of dollars of cost
--
Charmaine Taylor/Publishing & Elk River Press
PO Box 375 Cutten CA 95534
www.papercrete.com
 

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