laying vinyl over ceramic tiles

[abinath]

Morning,

I want to lay vinyl over existing ceramic tiles in the kitchen and bathroom. I won't be removing the existing tiles as that would disrupt too much installed furnishings.
I know that I need to avoid existing grout lines showing through the vinyl.
What would anyone think of these options, please ?:

- self levelling compound. I am ok with doing this, expect I think there are a couple of areas where there is a fall in the existing tiled floor of up to 10mm in 0.5m. Can self levelling compound still be used ?

- filling in the existing grout lines by grouting. Can I merely smooth over the existing grout lines, ie add more grout to eliminate them ?

- can self levelling compound be used to fill in the grout lines, ie the self levelling compound will 'sit' in the grout lines without draining out ?

- what about felt-backed vinyl instead of standard vinyl ? I've heard this may be very good at preventing grout lines showing through.

Thankyou

also, can self-levelling compound be built up in two layers ?

 

[bobasd]

bad idea - if possible never lay vinyl over tile.
we would never accept that as sound practice - we always lift the tile an prep the subfloor for any finished surface.

you dont fill with grout.
SLC can be used in two layers. but prep first.

 

[crazydaze]

If the grout lines aren’t too deep, lay F-Ball Isolator membrane and lay the vinyl on top, perfect, quick and Won’t damage the tiles whilst leaving a perfect flat finish.

Felt back vinyl will still show grout lines through the backing.

 

[dazlight]

Needs to be tested for any moisture.
But we rapid repair the joints then prime & screed the floor at 3-4mm