As I sort-of hijacked and resurrected the original thread the first time, I’ll assume this is directed at me and not the OP. The plaster has been great for us, however believe it or not we still haven’t done the finish coat anywhere in the house! The wall temp to the touch is dramatically improved and overall the rooms feel notably warmer where we’ve done this (vs the rooms which we haven’t done yet). Drying time and the hard work mixing the insulating plaster are the biggest drawbacks. Careful using it in places where there is perpetual moisture as the bioaggregates like hemp / cork can start to mold if the wall is too slow to dry.
We had a minor spot of that near the bottom of one wall where a plastic underfloor DPM retrofit laying under a poured-in cement floor keeps the bottom of this wall slightly damp from moisture migrating out from underneath the plastic. Small patches of rusty orange mold appeared after that corner still hadn’t dried out 100% a month after application. So I ran a dehumidifier and small space heater in that corner, finally got it thoroughly dried and the mold has now died and faded and the plaster in that corner is now staying bone dry without any heater or dehumidifier help.
Everywhere else it fully dried out within 2-3 weeks and had zero problem. If I were doing it again, in any areas with some persistent moisture issues I would just swap the cork for perlite.
That's good to hear! did you end up using the quicklime in the end or did you finish it with hydrated? Any difference between the two versions over time?
