Replacing kitchen floor

[qihto]

Hi, currently digging up an old tiled kitchen floor (+screed).

We have about 170mm-180mm of vertical space between the concrete slab and the bottom of the external doors. Planning to put in some dpm, insulation, chipboard, and a new engineered wood floor. Anything else to consider? Ive exposed the dpm under the external walls, how do I join this to the new dpm when I lay it?

As it will support a kitchen should we put wooden joists in for stability and insulate between or just float the floor on top the insulation? Is it worth considering UFH?

Thanks

 

[ree]

OP,
Why not post pics of the work so far and a pic of the exterior at ground level?
Could you indicate the DPC in the wall?