Can you see a visqueen sheet under the concrete ? Any concrete before 1990 really needs a Dpm I’d say. It’s good if it’s high above the ground...
Do the ardex na build up to get the concrete side smooth. then ardex DPM1c over it. then a fibre compound over the lot at 5mm. But massive...
Would have been better taking the floorboards up and using the 18mm plywood to the joists then overlaying with 6 or 9mm SP101 plywood. Then the...
Try using Tapatalk to post the pictures. Yes floor needs to flat to have a LVT click.
If they haven’t got any bigger and solid then rub down and feather finish over them.
Was all the ufh boards solid before the 1st coat of screed was done ? Was the 1st coat primed before the 2nd coat was done ?
Is the ducting flush to the rest of the floor. You could need some plywood or latex screeding to sort the levels out.
We use the xtraflor moduleo seal now and then but less then 1mm I’d leave it alone
