Papercreters: [papercreters] Re: Breathable paint for papercrete

Wednesday, May 4, 2011

[papercreters] Re: Breathable paint for papercrete

Thanks for the response. I think I will be waiting as long as I can to paint, I have other things I can work on such as the floor and and a desk which will take a while. It will be harder to paint around this stuff later, but I guess I will just have to get some drop cloths and deal with it.

As far as the shrink wrap goes, it is basically like a big thick sheet of plastic... not permeable to water vapor. I had to pad the corners of the pipes when I put it up to keep it from poking holes. I think that if I had put the bolt heads on the outside, cut the corners of the pipe and run them through a wire brush on a grinder it would not have been a problem though.

At the time I was not planning to papercrete so much... if I was doing it again I think I would have used palette wrap.

--- In papercreters@yahoogroups.com, Neal Chabot <sire@...> wrote:
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> My advice would be to wait. Anything you paint on the wall will retard evaporation, which increases the chances for mold. Rolling the dice with mold is not something that anyone should do. Think of what it would cost to remedy a mold problem? Are you knowledgeable about whether water vapor can escape through the shrink wrap?
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> As for Drylok, unless you are planning on stopping a wall of water up to 20 feet high, it may be overkill. There are dozens of breathable paints on the market. Just google it. One example is called "Silicate Dispersion Paint".
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> Neal
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> ----- Original Message -----
> From: "Brandon Hoult" <bhoult@...>
> To: papercreters@yahoogroups.com
> Sent: Tuesday, May 3, 2011 2:51:14 PM
> Subject: [papercreters] Breathable paint for papercrete
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> I am building a geodesic dome covered with plastic shrink wrap that I then sprayed a few inches of papercrete on both inside and out. The project is documented at http://minimalintentions.com. I am at the stage where the inside is still quite damp and I need to paint so I can put in a floor and desk. The best solution I have found is UGL Drylok which can be stained and apparently allows water vapor to still escape. My concern is that it will not allow water to escape fast enough and I may end up with rotting / mildew inside the papercrete.
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> I can wait if necessary, but am impatient to get this done. So my question is are there any other interior paints that can be stained that are breathable? Is Drylok the best solution? And any advice on how dry the interior needs to be before I can paint.
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> Thanks...
> Brandon.
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