Comment by blindseeker

So I live in one of the mentioned flat roofed houses. We restored it to its original appearance, but with very modern internals (proper insulation, heatpump, wall and ceiling heating areas, KNX-based smart home, etc.). It’s a piece of art on 110sqm, with very practical floor plan. To optimize space and material, every single wall has optimized thickness. Really impressive attention to detail some 100 years ago. Oh, and the roof has never leaked… (2.54 degree pitch btw)