Cat trims I’d say are better. Not sure what’s going on with SR at the minute. Had problems with my last 3 orders. Twin trims the top section not on correct. Also scratches on bendy bulls.
Ardex NA is still the best for that situation. I use them all. Should have used 2 units really. Fball should have told you not to spilt a bag up and you won’t get the mix exactly correct. Are the tiles glued direct to the asphalt ?
Not sensible.
You can’t use laminate underlay with LVT click. To soft and thick. You need LVT underlay if it doesn’t have one in.
Go 9mm plywood or 6mm if it’s flat. Maybe go glue down LVT.
Moduleo Layred and quickstep alpha are the best LVT clicks on the market.
Scrape up anything loose
Prime sub floor with water or 8-1 primer
Screed floor at 3-4mm with one of these
Ardex na
Bostik CL955 advanced
Mapei na
Fball 1200 Pro
Kerakoll pro flow
Then Dpm it. Has to be a epoxy
Ardex dpm1c or fball F77 is what we use
Get the builder or the floorlayer to get the tiles up. Wet them , double bag them and you will be fine.
Then do a Dpm butty as that floor needs it. To be honest if the builder doesn’t know that then I wouldn’t let him touch the floor.
Remove tiles and loose screed.
Apply 3-5mm coat of ardex na /...
It won’t come off if you use it correctly . Used it loads over the last few years.
Make some no loose bits on the screed. Prime it as well so better bond.
Was the chipboard all level ?
We tend to find chipboard is level as it’s new. So then we go 6mm ply and feather finish.
How did he screed the floor? With a trowel or a pin leveller.