Levelling a stone flagged floor

Question

I have an original stone flagged floor how do I level it and damp proof it before laying LVT

Bradley · Accepted Answer

Black jack the floor ,let it dry maybe give it a couple of coats to be safe , then use Feb floor,which is a self leveling compound

Damien · Answer

Tank the stone with a few coats of tanking and then use latex self levelling which kind depends on the thickness needed just make sure to prime the floor before using self levelling

Peter · Answer

I would advise to nstall DPC membrane before you pour you levelling compound whether that be concrete or self levelling.
Also a layer of tanking slurry would be beneficial

Paul · Answer

Personally I wouldn’t. But if you must, take them up and sell them, they are worth a lot of money!
Then install damp course membrane, insulate , then screed level.

Darren · Answer

Self levelling compound with a membrane before tiling. However the flagstones will not be able to be recovered if you change your mind.

Jake · Answer

Depending on which type of LVT you use is the difference to which why around you prep before laying . if you are using glued down i would go with the black jack method below or if its just click then just floor level with a decent floor leveling compound (make sure its well primed before) . Then a thin DMP under would work just fine .

Paul · Answer

Self levelling compound / latex will help level - damp proofing is a seperate issue and would reqquire further info / investigation in order to answer properly.

David · Answer

Take up the existing dig down approx 300mm lay down hardcore and a sand blind also lay down insulation slabs Kingspan
a visqueen damp barrier and reconcete then lay down the original flagged flooring

Jason · Answer

Remove the flag stone membrane and then self leveling

Owen · Answer

Screed to level it and can use a chemical damp corse

Levelling a stone flagged floor

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