I am going to build a slope outdoors on a balcony. Thickness from 5 to 25 mm, the slope must be built up with a type of "concrete filler" as self-leveling compound or similar will not work. The stretch is 6 meters and the width is 0.3 meters.
I tried with Ardex A46, which on paper looked really good, waited until nightfall for it to get a bit cooler... But unfortunately, it's currently too warm, and the A46 cures before I manage to spread a significant amount, after 3-4 minutes it becomes unworkable :(
I have to do it in the coming days as the roofer is coming at the end of the week to do their part.
Does anyone have tips on which product could be used?

Attaching a picture so you can see what I mean. The slope should be built up from the lecan with the gutter hooks to the end of the concrete curb.
 
  • Balcony under construction with concrete blocks and metal brackets attached, showing an area prepared for slope installation between Leca and concrete edge.
I made a similar case out of the garage with plaster.
 
Yes, the idea has crossed my mind, I did a test build with plaster yesterday evening to see how it turns out.
 
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