We are planning to do self-adhesive vinyl in some rooms of our new building (with underfloor heating). The base of the floor is a cement screed. Now, after initial research, I'm confused about subfloor preparation, as well as any impact soundproofing (or is this only necessary for vinyl flooring?).
My questions are:
1. Does the screed under the self-adhesive vinyl need to be treated with a leveling compound over the entire surface anyway?
2. If so, what will happen to the expansion joints in the screed? How do I protect them?
3. What happens if I don't use a leveling compound?
4. What comes after the leveling compound? Directly self-adhesive vinyl or other impact soundproofing?