Is this a good solution for parquet dilemma?

[kissinger]

I’m putting parquet all through my downstairs, but I have a 3mm lip where the suspended timber floor buts up against the concrete slab in the kitchen (put in during previous extension).

I thought about simply putting down a metre of 3.6mm plywood in front of the lip and feathering it via sanding. Would that work?

Seems a lot cheaper, easier and sturdier than levelling compound.

 

[robinbanks]

I think it's a lot more work than shaping something cementitious in though, as you'll want to run quite a way to avoid having to do a considerable amount of sanding to smooth out any kick in the parquet ?