Self levelling compound has gone wrong

Joined
30 Jul 2024
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Hi all,

I overboarded my timber floor with 6mm ply last weekend, primed and poured some self leveller yesterday. What I’ve ended up with is worse than I had before, with a dip of probably 4mm in the middle of the room. This happens to be the point at which the 2 batches I mixed meet, though I would have expected more of a ridge than a dip! I followed the instructions in terms of prep and mixing, but my combi drill started playing up so I think potentially the second batch didn’t have quite the right consistency.

Anyway, I’m not sure what my options are to fix this. I assume I need to pour another coat of self leveller, but is it necessary to do it over the whole room, or can I just target the low areas? I’m using setcrete high performance, and I’m not sure if it’d be possible to feather out the edge of it. Something like ardex feather finish I think is out of the question, I’d be at it for ages building up 1mm layers
 
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