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We live and learn mate... supposedly brought in the experts to fix this as had little knowledge around the subject when we first started but looks like I got some very questionable advice.

Just thought I'd post a little update here... I think it's pretty clear that from the advice posted in this thread the work that was carried out certainly wasn't the optimum solution to the problem at hand. If I was ever to use the membrane again in a similar environment at a minimum I'd want...

FWIW the only dehumidifer I could get my hands on at short notice was the Xpelair 16L from Toolstation. Not exactly industrial.

Hi Earthy, Thanks for the reply. The plaster has been dried maybe a week. We've got a relative humidity reading of 60% in the room at the moment but the floor has more drying out to do so I'm hoping this will drop over the next week or so. I spoke to the contractor who did the damp work this...

Thanks for the reply. Appreciate all the help that’s coming in this thread so far. What, if anything, can be done to fix the issue?

Im pretty sure it’s not a leak as the same problem is present throughout the property. Plaster has been dry over a week and moisture on DPM shows no signsof drying up.

Hi Martin, Thanks for the reply. There's no pipe work behind those boards and there’s no leak either. It was just brick before the DPM and membrane went on. The DPM has been fitted in three rooms and is wet behind the plasterboard in all areas where fitting has been done on external walls...

It’s a permaguard membrane which as per their documentation is suitable for dot and dab plasterboard fixing.

Yes existing damp problems is why we have the DPM. The room has trickle vents in a single widow and a pacifier vent. Doesn’t seem to be helping though.

Hi Martin, The company who did the work can be called back but my confidence in them is very low as everyone who worked on the job were subbies and in a rush. We had some damp issues in the walls and damp meter readings were poor in a lot of areas which is why it’s full height. The issue is...

Flat is in Gateshead mate.

Hi guys - have a very similar problem to this and would appreciate any input you might have given you seem to have solved it https://www.plasterersforum.com/threads/inside-of-dpm-soaking-wet-condensation-problem-fix-needed.78876/ Thanks Dave

Hi all, We are currently renovating a downstairs 1920 (ish) flat and have had damp proof membrane fitted by a local company. Plasterboards were then dot and dabbed onto the membrane and plastered. The inside of the DPM is now soaking wet when you put your hand up the cavity between the DPM and...