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by fartingflamingo 1708 days ago
I guess the parent commenter meant to say hydraulic limes are inferior in terms of breathability compared to hydrated lime. Which is entirely correct.

As always, it's a trade-off. Anecdotally, we did the base plaster layer on our straw bale house using hydrated lime for better breathability. We'll probably make the top coat slightly hydraulic using trass.