DPM on wooden floors under laminate?

[dolomites13]

I have wooden floor sitting on Joists over an 18" cavity. I want to put down a 12mm laminate floor on the floor boards, do I put a DPM or a plain one, I wonder if a DPM will make the floor sweat. Thanks.

 

[WoodYouLike]

Plain one without the dpm

 

[dolomites13]

Plain one without the dpm

Thanks, at last clear advice. so many people give differing advice think we will jump off the roundabout and put plain down. Thanks.