Hello! Hoping there may be some builders/ floor specialist who can help with some advice! I'm stressed out my head with it all now!
We've been undertaking quite a big extension on our 3 bed semi. Adding a bedroom above garage and extending only slightly at the back to make an open kitchen / living area. We decided to bite a very expensive bullet (but felt it was a once in a lifetime thing to do!) And get the while ground floor LVT. The kitchen / living area and hallway were going to be done anyway so it was just adding the front room which the carpet needed to be replaced anyway due to dirt of building work!
Because of the building work we've had a lot of fresh concrete so when the flooring guy came to measure up he took damp readings which as expected came back super high so he said we would need the highest level of DPM (some kind of damp course treatment) and in our invoice it states 2 layers plus 2 layers of screed.
The fitters arrived last week, really quite disinterested in talking to me at all, quite rude and arrogant but we took ourselves out the house as they said they were doing the whole ground floor. I asked if they knew where to put the damp course which he just went yeah yeah and that was it.
We arrive home later that day to find them gone and only half the job completed. I rang shop and they asked if they had spoken to me which I said no. The fitters rang me and said, oh they didn't have enough screed for the back and not enough ply so they'd have to come back at the end of the month when they fit the LVT. Annoying after we moved everything out of the ground floor purposely for this reason, but anyway.
The next day we go into room and it just looks an absolute mess, not pushed screed to edges fully and bubbles have appeared in an area that I know has concrete. It looks a different colour as if its still wet which makes me think they haven't put the DPM down. My sister showed me her DPM when she had the same done and it was like a black tar that set overnight.
I've looked at what they specified they used PE404 by Uzin and it does day it should dry for at least 2 hour between coats but looking at our ring camera footage I can see them mixing and returning with empty buckets of screed after 45 minutes of arriving. They also left all of their rubbish and it only shows two types of screed and no DPM.
I've been to the shop and they said 20 mins between layers so I now know this isn't right, they also said after I said that I couldn't see any of the bottles used (I was told we would need 2 big 10l bottles), conveniently they brought them back to the shop to dispose of.
I'm at my wits end, scared to let them lay LVT if it's going to fail after a matter of months due to damp but how do I prove or test the area to be sure? Pictures for reference! Thank you for any advice you can offer!!