I'm surprised more people don't use shingles or clapboards on papercrete.
Shingles are inherintly redundant, they can flex with a wall. If papercrete shrinks after the shingles are installed, the shingles will settle along with the wall. Cracking shouldn't be a problem.
It is possible to find some extremely inexpensive options to make your own shingles if the "free factor" is important.
A dome can be shingled too, but some type of membrane probably makes sense at the apex of a dome where the curve is essentially level. Shingles need some slope to be effective. Of course, someone could alter their dome design and put a cupula on top of it such that there is no exposed level roof at the apex. (good place to put an exhaust fan too.)
--- In papercreters@yahoogroups.com, "donald1miller" <donald1miller@...> wrote:
>
> I think a pc dome would be difficult to seal completely especially in an area where you live where you get a lot of rain. I would think the only way to be completely confident on the mold issue would be to infill between conventional framing and siding but then one loses the "cheap" factor which is one of pc's strong points.
>
>
>
> --- In papercreters@yahoogroups.com, Jerry Fant <jerryfant@> wrote:
> >
> > I am not as much worried about total failure as much as the flexing will create cracks in the outer finish. These cracks will let moisture into the pc. I live in Central Texas, the Hill Country and we get a good amount of rain about 35 inches a year sometimes! Black mold is prevalent here. My walls that I am designing are flat walls, a conventional style structure to match my house and such. If I were building a dome type structure the issue would not be as important since the curvature of the house and roof would alleviate most of the mentioned stress'. So why not build a dome structure? I am not a fan of the dome, in the floorspace inside the dome I see a lot of wasted space especially for a workshop.
> >
> > Jerry
> >
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