Can DPM sheet go under and above the polysterene

[clubb699]

Hi all,

Just a quicky is it ok to have DPM on both sides of the polysterene iam about to add in my conservatory floor as i have got anought to do both sides if allowed?

Thanks lads

Lee

 

[freddiemercurystwin]

You don't need a full dpm above but normally you'd have a much thinner one to stop the screed seeping into the joints.

 

[clubb699]

Yeah ok thanks i was wondering if it would harm anything thats all i got 25 m x 4 roll so will only be using 1/4 ish of it so if it dont hurt i might aswell put it on the top too