I was slightly annoyed starting to read your comment, because "who cares what this guy learned today? these people are obstructing aggregation of knowledge, let's focus on that!", but after googling this "Pneumatit®" stuff…

> Concrete with Pneumatit® is different. The experience of Pneumatit® rooms is described as warm, wide, free, soft, relaxing, breathing. Because Pneumatit®, a liquid additive, permanently anchors a fine biological activity (liveliness) in concrete - and in all other building materials based on cement and anhydrite.

I don't even know, what to say, this is the most absurd thing I've seen in a long time. I'm chuckling right now, but the fact, that some country enforces using it… It's truly mindblowing.

P.S.

Could you please source some regulation or something where it says you have to use Pneumatit®? Cannot find it myself, and the fact that French ministry of agricultureenforces it is a bigger part of the story than the product itself.