LVT flooring advice gladly appreciated

Hi all
So we’ve recently had an extension built. Decided to have LVT flooring to continue from previously laid (previous job fantastic) in our hallway and kitchen so flows nicely throughout. So our extension is joined onto lounge. Lounge is chipboard and extension concrete slab. Done my research and hired a dehumidifier for a month to speed up drying out of slab which was tested etc prior to laying of new floor. So we had 6mm ply on boarded floor and the slab self level however that seemed to be haphazard as when I looked the following morning the self level was actually a few mm short of the ply. So I questioned the so called perfectionist I thought I was hiring. He was like don’t worry all will be fine etc. So instead of levelling it all so all completely level he threw some screed down between ply and lower level of screed and carried on so in the end this created a slight bump going through to extension as have a walk through to extension from lounge. Now amazingly the floor appears to have remained stuck down over this uneven section. My main concerns I’ve noticed in several places planks are not stuck down and able to be lifted. There is so much lipping going on and a lot of rough corners where I suspect he’s used his handy Stanley to try and stick down. I called him after day of finishing to ask to pop back as I noticed some lipping. He came out. Heated up edging of a plank or two and took his Stanley to push hard on a few corner edges. He pushed down for a few seconds which maybe not long enough? Anyway needless to say since then I’ve noticed other planks lifting and so much lipping, rough edges etc. I’m worried as our extension is a sun trap ad now questioning whether he even used the so called high temp adhesive I asked him to use when he came to first price the job up.
Hopefully I’ve explained myself clear enough without too much waffle
So in your honest opinion is this better just all being ripped up and redone by an actual professional properly or could it be rectified?

 

You got any pictures to show us?

Was the new slab definitely dry?

 

Yes slab defo dry. We hired a huge dehumidifier for a month and tested whole area with a damp meter. I’ll see if I can upload a few pics on laptop as saying file too large when try on my phone ‍♀️

 

What actual damp meter did you use?
How long was the new slab left before fitting on it?

Did you test it yourself or did the 'fitter'?

 

Depending what glue he used then he may have left it to air too long therefore losing its bond

You mentioned the sunlight so if he hasn't used a wet set then this could be the issue providing it was definitely dry enough.

Was the slab a sand and cement do you know?

 

Not sure but it had prongs
It was left a good 8 wks+

 

Yes sand and cement and our extension has a large lantern above and bifolds so lots of sunlight

 

There’s a few not stuck down in places in the lounge too

 

We're these noticeable straight away or has it happened with time?

So it was tested with the prongs?
Did you test it or the fitter?

 

If they lifting in the lounge aswell then it could be down to poor fitting and late placement with the adhesive

 

We had someone pop in with a meter

Tbh I’d say almost half the flooring is not fitted that well as there is a huge amount of lipping but not massively noticeable and more noticeable in various places. So far I’ve found at 4 areas 2 in each room not stuck down that well in which I could get my nail under and probably pull up ‍♀️

 

Both in lounge I noticed same day and 2 in extension yesterday about 10 days after fitting but they could have been like that since fitting. Only noticed as I’ve been doing skirting sliding around the floor otherwise wouldn’t have noticed unless felt underfoot

 

He used the p48 and the high temp one. Can’t remember number

 

That should say p46

 

F48

 

F46 & F48

 

I'm assuming he used the 46 on the ply'd area and the 48 on the extension. Domt know why some do that, just use the same all way through.

If there is lipping in the ply section and same in the new part then he aint that great if he can't get them to stick on the 46 ...unless he used them back to front

 

What LVT is it ? Did he Roll the floor with a 50kg roller ?

 

It’s lotus international one. Don’t know if he rolled the floor first or not but he was throwing self level around and not exactly careful. He used like a mallet thing to stick flooring down I think. We had the same flooring in our kitchen and hall a few years ago so thought I’d have it all way through. The previous guy I used did such a great job of the previous job but this is on another level. Don’t get me wrong it’s not terrible but nothing half as good as kitchen and hall. Cutting in around architrave instead of shaving bottom off as we waited to have skirting put on after. I asked him why he run a bead of caulk along bifolds. Obviously to hide sloppy finish as last bit. Just goes to show some reviews really aren’t a true reflection whatsoever

 

He seemed to hoover plenty prior to laying