Does polystyrene flooring insulation react with dpm?

[3Bowls]

Hi all, about to put flooring insulation into finished extension below the floor. Was going to put a length along the edges of the dpm before putting a timber frame in to support the flooring above. So insulation is sandwiched between dpm and wood. Will there be a reaction? Heard there could be?

Thanks

 

[^woody^]

It wont react with polythene sold as being suitable as a DPM (to PIFA 6/83A:1995) and with a BBA certificate

 

[3Bowls]

1200 gauge dpm fitted, so all should be ok.

Thanks