vinyl should be removed before installing ceramic tiles. In general, it requires a total of 1.25" subfloor thickness for ceramic flooring. In most of the new constructions, the builder had put a thin layer of plywood on top of the subfloor before gluing vinyl. You may very likely need to add around 3/8" of subfloor on top. In that case, you would not have to remove the vinyl, but remember, always keep the rough side of the plywood face up, to obtain better adhesion.
要先把vinyl揭掉。把厨房柜子边的木条慢慢取下(留着再用),很容易把vinyl揭掉, 然后就见合成板了。 我去年底刚换过厨房, 门厅和卫生间的地面。