Source
Part 1: Housing shortage
16 million Germans live in big cities...
...and almost all of them live in tenements.
The main disadvantage of the 4-5 storey tenement is the narrow, lightless courtyards
These courtyards are created when houses are built with side and rear buildings in order to make use of every square meter of floor space.
Dark courtyards are veritable breeding grounds for vermin and disease
...and particularly disastrous for children.
In Berlin, 33% of all apartments have only 1 room and 40% have 2 rooms - and large families live in such cramped apartments.
Where the sun doesn't reach, a doctor will have to visit.
Here we see an overworked homeworker, in poor light in a dirty, musty apartment.
Another consequence of people living in such close quarters is gossip, quarrelling and bickering.
It is no wonder that these people without a home seek their recreation in the pub.......
...and when drunkenness, prostitution, and crime find their lairs here.
But the hundreds of thousands of people in emergency barracks and garden sheds, which serve as kitchens, living rooms and bedrooms, are not much better off.
Source: Wie wohnen wir gesund und wirtschaftlich?, dir. Ernst Jahn, Humboldt-Film GmbH, 1926. Bundesarchiv Filmarchiv Filmwerk ID: 2897 https://digitaler-lesesaal.bundesarchiv.de/video/2897/657754