Okay, the movement joint is unusual and dispensable in residential construction – unless it concerns the connection of a stair system. This applies to both concrete and screed work. And dummy joints can be rigidly closed after the screed matrix has hardened. So much for theory and practical approach. In the case described here, considering the progress of the work, I would also ignore the (very slight) height offset. For a wet screed manufactured according to standards, the unevenness on the surface may be 4mm over a one-meter measuring point distance. Well, in this case, it is not an unevenness in the sense of the standard, but an edge-shaped height offset. Good locking of a multi-layer parquet, and that is why I mentioned the permissible surface unevenness, can absorb bending moments in the order of up to 4mm without damage. The only thing that might occur later would be a slight "rocking" at the point where the edge offset is. I think: that can be accepted. ------------------------------- Regards: KlaRa