then 1946 is probably particularly critical? How exactly does that manifest in the substance? Thin walls? Structural limits? In 1950 that might no longer have looked quite so critical?
1946: many key workers had not yet returned from prisoner of war camps, the Trizone was still administered by the Allies, logically there were no peacetime organized economic conditions yet, the currency reform was still in the future, any existing personal assets did not yet have a clean slate. Many late-born people imagine the end of the war like a light switch, all clouds immediately pushed aside. Blessed are the ignorant. I always say, people without great-grandparents nearby are actually orphans. An air layer back then had little to do with knowledge about insulation, but much more with saving materials. So also a form of thin walls, if you see it that way. Structural limits, yes and no: light walls in the attic hardly burden the wooden ceiling, ground floor ceiling and roof structure often form a unit (similar to today’s truss roofs), the roof structure supports tiles well but must first be checked for suitability for photovoltaics or the like. 1950: the construction industry is hungry for growth, patchwork covered with plaster is not uncommon. I have already mentioned several times that the 1950s were several decades in terms of construction technology and lasted until about 1963.