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Damp Proofing

Should DPM in a ground floor be placed above or below the insulation?

Anonymous user 16 March 2024 - 2.45 PM

I'm trying to understand the best position to have a Dpm in a ground floor, I've been told to always have the DPM placed on the warm side of the insulation ie above the insulation, but I've seen other solutions where the DPM seems to be below the insulation. Is either solution okay? whats the difference?

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1 Answer

Anonymous user

Hi the dpm should always be placed underneath to prevent any moisture coming through, but further to that now building regs want an extra sheet of dpm on top of insulation before pouring concrete. Hope this helps 🙂
Answered3 December 2021
4