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Re: [Strawbale] moisture



Hi Niki and Jonas. I would be careful using a material like clay (earthen plaster) on an interior surface and lime on the exterior. Keep in mind that clay allows for more movement of vapor (is more "breathable") than lime. This means that one can transport say 1 measure of vapor into a bale wall through the clay plaster while only allowing for .75 measure to move out through the lime in the same time period. This means that excess moisture can get stuck in the bales.

I have a wet sauna here in the states made of straw bale walls. I used lime plaster on both sides of the walls with a lime paint on the interior. After a sauna is completed, we open all of the ventilation ports and through an extra log or two into the fire. This drives the moisture through the vents and walls and dries things out with the dry heat of the fire. It's very successful.

Andrew

On Wed, Apr 6, 2011 at 8:46 AM, jonas kacerauskas <jonaskacerauskas@gmail...> wrote:
Hello Nikolay,
Here in Lithuania 4 years ago we have built straw bale bathhouse (like sauna, just with alot of moisture - we call it russian sauna), where we use simple clay plaster about 3 cm. on interior wall and from the incident water protect with wooden plankets (there is natural ventilation inside). On exterior we did lime plaster - till now everything works fine. tadelact is quite expensive way and not needed way to deal with it. As we saw its enougth just clay plaster to deal with humidity and ussual you need to protect just several places from the direct water and were are a lot of ways to do it:)
best regards

2011/4/6 Nikolay Marinov <nikvesmar@gmail...>
Hi everyone,
I would like to ask you for advice and share your experience about preventing moisture, penetrating into SB walls from bathroom, and other spaces with high humidity level.
What kind of layers and finishes do you prefer to protect your wall if not using conventional waterproof materials.
I know few techniques as: Tadelakt (good water barrier but time consuming); Double skin wall with ventilated space between,glass on the wall, but it would be nice to share a trusted and working in time method that builders and designers like you prefer as solution.

Thank you in advance for you opinion.

Have a nice spring sun.
Niki

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____________________________________________________
   European strawbale building discussion list

Send all messages to:
Strawbale@amper....muni.cz

Archives, subscription options, etc:
http://amper.ped.muni.cz/mailman/listinfo/strawbale
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