How to attach DPM to flush DPC

[Backlash187]

Hi everyone. Hoping someone can help as I can't for the life of me find a decent answer.

I am converting a single skin brick shed into a utility room on the rear of my house via a flat roof. The plans call for an inner stud separated from the outer skin. The floor construction on the plans are 100mm screed, on 500 gauge vapor barrier, on 100mm therma-floor insulation, on 100mm concrete, on 1200 gauge visqueen DPM, on hardcore & sand blinding. The drawing calls for the DPC and DPM to overlap. My issue is that the old bitumen DPC has ripped flush with the single skin wall. Do I just bring the DPM level with the DPC, or do I overlap it?

Thanks for your time.

Will

 

[^woody^]

Run the DPM min 300mm up the frame past the DPC.

 

[Backlash187]

Brilliant. Thank you for taking the time to reply woody.

Will