Terrace without slope - From which DIN / regulation?

Regarding the question of where the slope is precisely described:

As far as I know, there are no concrete binding specifications for terraces (similar to DIN standards or the like). However, a slope is part of the recognized rules of technology. In doing so, one refers to the DIN for (flat) roofs with, as far as I know, 2%, as well as the official technical rules of the roofing trade and the Central Association of the German Construction Industry, which also specify 2%.

For stone terraces on gravel, etc., I also agree that a slope is essential. For raised terraces (i.e., stone on pedestals or wooden terraces), I would never install a slope, since only marginal water remains there, and 98% is drained through the joints and the underlying construction (also my own experience from numerous personal terraces and terrace builders).

I think you can interpret the individual feedback for yourself as the respective author intended, and of course no one wants to deny you anything or persuade you otherwise. However, reflexive shouting around during construction is not a helpful trait. You wanted to sell your flawless house, which you never want to show, at least that's what I read from you, and you had already said goodbye here, try it with two notches down in your tone – just fitting your reality.

At least that's what I read from you, and you had already said goodbye here, try it with a tone of voice two levels softer – just matching your reality.

No, that was the woman who was having troubles. Or was it both that suffer from his tone? A forum takes out its popcorn supply, but what about the environment?