Uneven concrete/bitumen floor

[markhi123]

Problem:

• Tiling a kitchen floor.
• Half is covered in bitumen (from parquet floor). Half is a new concrete slab.
• There is a 35mm level difference across the floor and is fairly lumpy.

Possible solution No.1?:

• Use latex self-levelling compound such as arditex na.
• BUT: I am slightly worried the new slab may move and crack along the joint. Which will crack the slc and the tiles.
• BUT: This solution will offer no insulation and due to the level difference will cost an arm and a leg!

Possible solution No.2?:

• Lay chipboard tounge and groove flooring. Using an adhesive to take make it level (in a similar fashion to dot and dabbing) then tiling onto that. Maybe screwing it to floor as well
• BUT: will this stand the test of time?
• BUT: is there an adhesive available to do this?

Please, please help. Gone round and round in circles with this one. Thank you in advance