11ant
2017-10-11 13:06:26
- #1
After some research, it also seems to me that 36.5 is actually standard and the 24 cm quite thin?
You didn't need to dig up this thread, the topic is still currently being discussed here as well: for example in and (without claiming completeness).
"Standard" has been 36.5 cm since about 1980, and before that it was 30 cm; what is prescribed is not a wall thickness, but a maximum thermal transmittance value – at least that was the case until now. With today's Energy Saving Ordinance, it is somewhat different, as they focus on a mix of heat transfer through walls and other building elements, energy saving and generation methods and the like. That means one can "adjust" the type of heating, the size of window areas, etc., and wall thickness as an adjustment screw of the overall result has somewhat receded into the background.
24 cm walls – made of any stone – without additional insulation are terribly outdated. Recently, I believe I read here in the forum about a trick where house providers still include walls according to the 2014 Energy Saving Ordinance in their service descriptions and beautify their price quotes by making the fulfillment of the 2016 Energy Saving Ordinance – although it is a condition for building approval – an extra paid option. But this is nothing new, that penny-pinching and seriousness exclude each other; that was the same in the days of Kaiser Wilhelm as it is today. And probably long before the "ancient Greeks" as well.