A general contractor nearby installs the Bisoplan from Bisotherm. I've found rather little about this stone here in the forum.
The pumice stones are similar to the regional builders, or to the aerated concrete blocks that are not called Hebel or Ytong. Where exactly are you building?
Are there more user experiences? Who has installed it and can report about it?
I suspect that the pumice in all the houses I have lived in so far was from Bartsch (no longer exists) and was installed by my friend Heini Kochhäuser, *smile*. I usually don’t chat long with the builders during my construction site walks, and yes, only with a few at all. Riffer is local here, and Bisotherm is immediately recognizable ("pink pumice"). However, it is about as common here as the stones from KLB or Meurin. In a volcanic rock hotspot, white masonry is rare. Only if a builder has a generational change and the junior absolutely wants to do something different than the old man, then porous bricks have a chance here. In the immigrant districts, red brick masons are stronger, but among the natives pumice still has the largest market share. I’m not building yet myself, but I would probably have Bisotherm in my shortlist. Anyone who would close a building gap here with aerated concrete blocks would probably be the talk of the town at the bakery or in front of the pharmacy.
