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https://www.youtube.com/watch?v=Qwbp9T-WS-I

"Terassenhaus" a blast from the past...
They were popular in Germany in 60s and then they disappeared.
I would like to know why.

Just from a pure #building #physics point of view, I could imagine the following negative points:

- More area of "flat roof" or balcony on top of living rooms (weather and rain could easily cause problems, leaving the rooms underneath at risk and creating higher maintenance costs to keep everything dry).

- more exterior surfaces lead to more heating+cooling costs and create more expensive construction.

- They often use a lot of #concrete which has some general negative sides (high #CO2 emissions; it's inherently porous and can therefore absorb water, which can lead to moisture problems. These include structural deterioration through cracking or crumbling, corrosion of steel reinforcement and possible mold growth. All of this can affect building integrity, energy efficiency and health conditions...).