Vinyl flooring what thickness/strength

Hello dear community,

I would like to ask for your opinion on the following "problem"

We are currently in the construction phase of our single-family house. All rooms, except the bathroom, WC, and utility room, are to be fitted with vinyl flooring.
My general contractor recommends a vinyl floor with at least 7 mm thickness because otherwise the screed has to be raised due to the height difference with the tiles.
However, my floor installer recommends taking vinyl with 4 mm thickness because from 4 mm upwards the vinyl is covered with some kind of coating that he personally does not recommend.

I tried to find out more via Google but just can't get any further and don't know how we should implement this :(

Raise the screed so that the 4 mm vinyl is flush with the tiles?
Take thicker vinyl to raise the screed to roughly the same level overall?
What do you think? Helppp

Best regards

We use 3mm vinyl and have the screed raised higher. If you use vinyl and then have 6mm cardboard/cork/wood/mdf or something underneath, you lose the exact advantage of water resistance. Underfloor heating also loses effectiveness/efficiency. Additionally, the click vinyl options with mdf were significantly more expensive than pure vinyl for gluing.

For us, the only "concern" is that with this decision, you probably will never be able to switch to real wood.

We take 3mm vinyl and have the screed raised higher. If you take vinyl and then have 6mm cardboard/cork/wood/mdf or something underneath, you lose exactly the advantage of water resistance. Underfloor heating also loses effectiveness/efficiency. Besides, the click vinyl variants with mdf were significantly more expensive than pure vinyl for gluing. For us, the only "concern" is that by this decision you will probably never be able/willing to switch to real wood.

Thank you for your opinion/implementation! My feeling currently also advises me to go with vinyl with 4mm for gluing (3mm), but the statements from the general contractor unsettle me. I think we will never switch to real wood anyway due to the maintenance intensity etc. And raising the screed higher also means no tiles and the like for us. More in the other rooms, but we (at least currently for many more years) do not want that.. Best regards

"My general contractor recommends a vinyl floor with at least 7 mm thickness, otherwise the screed has to be raised due to the height difference to the tiles."
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"Good God, let expertise rain down!" (I mean the general contractor here)
But that's one way to put it.
Take a standard vinyl floor, whichever you like. The height difference when changing rooms or coverings will be leveled by your flooring installer.
That's how it's done in 99% of all new constructions and renovations.
Recommending elastic floor coverings 7mm thick really makes you wonder if that was meant seriously.
That just can't be ....
Regards: KlaRa