Hi there Hoping you can help please!!! Soriy if this is the wrong forum for this. We have a solid floor in a lounge/ dining room. We have had the old screed broken and removed and a firm laid a new "synthaprufe trade" bitumen dpm down on the concrete slab underneath. The flooring isn't level from the concrete slab underneath and results in dips and bows in certain places. We were originally advised to put a sand/cement screed across it all to smooth it out but have been told now that the depth in some areas is not enough for the at least ~50mm depth required for that type of screed. Any advice for what is the best approach to ensure both a level but also a suitably resilient floor which is suitable for shallow depths and also a solid base and butumen dpm please?? We plan for there ideally to be underlay and a carpet laid eventually when it dries but would consider another flooring if it made sense given the approach for the above. Obviously cost effective options welcome but interested in the recommend approach. THANK YOU IN ADVANCE!!!