Default Damp causing gapping - DPM question

Rising damp from a breached DPM might not cause anything but relatively localised issues - mould, mildew, discolouration, etc., and this could even be in the centre of the floor, nowhere near the edges. It could just be a very small breach - a small, steady amount of damp coming up, enough to affect the flooring, and that's pretty much all.

So, we unfortunately don't know.

Why they are being so secretive? That's a different issue. I don't know, but it ain't helpful.

I presume they lifted some of the flooring to check underneath? If so, can you lift some more to have a looksee?


Ok, another way forward... You play the 'innocent householder', which is indeed what you are. You cut to the chase; You've had a problem with your floor which all parties agree was due to no DPM having been put down. You write the flooring co a letter stating all this and giving them one week (a specific date) to renew the floor along with the DPM Underlay they should have put down originally. You say if you don't hear by that date with their agreement, you will get another company to do the work and you will sue them using MoneyClaim.gov (or local County Court) for the full cost - end of. You hand deliver this to the Gen Manager with a witness, or else send it recorded delivery.

At least that should sharpen their responses... But, that is the way you then need to go.

(But bear in mind that another company, when they see your floor and current damaged laminate, may run for the hills.)

 

The OP still hasn't answered as to whether there is a DPM under the slab, he has said there is a DPC in the wall.

 

Could just be condensation. Its a growong problem on new builds, where there is a lack of adequate ventilation.

 

Do the glass test, get a glass, should also work with a small piece of glass, apply a bead of silicone all around the edge & stick it to the floor for a few days.

Moisture on the inside of the glass, moisture coming up from floor
Moisture on the outside of the glass, condensation.

 

Did you chust make that up, or is it real?

 

Youngsters today know nothing, some of our senior members will know this.

Use to do this 30+ years ago, used a bead of putty instead of silicone to form a seal & a piece of glass, will work on the floor or a wall.

 

Don't you dare call me a youngster...

 

Try a small heat recovery unit like the cflo100

these will help with condensation etc

 

you could probably throw down anything flat on a floor and if its big enough it will get wet underneath, if the floor beneath is damp.