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[Strawbale] Soda and ulexite in clay




Hello Everybody,

 

I’m building my house in Belgium and I just started rendering the bales on the outside with clay (loam).

I added some ulexite (sodium calcium borate, a natural mineral) against fungus. I’ve also added soda (sodium carbonate). This lowers the viscosity of the clay so I can use less water which should give me less drying shrinkage.

 

Anybody any experience with these materials?

 

Best Regards,


Cas