I live in an old apartment where they removed the old balconies and recast them. My balcony is located at an angle of the building, so its slab is anchored to 2.5 walls. To prevent water from running down the façade below, they cast an edge/angle to direct the water. BUT, the angle I've marked with a red circle catches the water instead, forming a small puddle there.

I've measured the slope from the middle of the balcony out toward the railing, and the slope is steep, but right at this angle, the slope can't be sufficient. The idea was good, but practically it doesn't work. I've informed the board about this, and the builder has been here to look - but it feels like no one really seems to care much. I agree it's not a major issue, but water should never collect in this way - it feels sloppy when renovated for x million.

I think it's easy to fix, reshape the drainage edge so it gets a more straight line instead of an "L". What does the expert panel say? Anyone with BBR or another suitable book to look at?

Diagram of a balcony drain issue; red circle marks area of water pooling due to L-shaped edge, causing improper drainage despite intended gradient.
 
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