Expanded clay: advantages and disadvantages, thickness, suppliers

Ask your general contractor, our general contractor told us he achieves KFW55 with the 36 cm brick, without any additional insulation in front.

So you are also currently working on it?

I don't have to insulate the stone additionally to achieve KFW55 anymore?

You will achieve the standard Building Energy Act / EH55 monolithically with pumice (or also with expanded clay) in caliber 365, not least there are also various correspondingly optimized variants (thermolith, KLB, Bisotherm and whatever they are all called).

So you are also in the process right now?

We have been finished for 4 years and live in the house.
125 sqm living area, 2500 kWh heat pump electricity per year, without controlled residential ventilation, without KNX, without mold.
Simply with expanded clay/pumice stones, you were asking about experiences after all.

This is really a good tip regarding the regional building experts. Because it is really the case that many providers are very nice at the beginning, but in the end, you have invested more work, nerves, and money.

We have been finished for 4 years and live in the house. 125 sqm living space, 2500 kWh heat pump electricity per year, without controlled residential ventilation, without KNX, without mold. Simply with expanded clay/pumice stones, you were interested in experiences after all

Yes exactly. Thanks already for the info. And regarding sound insulation, you haven’t had any negative experiences either?

And as for the soundproofing

Above us was the flight path for Berlin Tegel,
in the old house (expanded clay) and in the new house (expanded clay),
no sound problem,
very little noise comes through the windows and the roof