ᐅ Self-adhesive vinyl flooring applied directly onto the screed

Created on: 6 Mar 2020 17:45
J
JaAberNein
Hello everyone,

We are planning to install self-adhesive vinyl flooring ourselves in some rooms of our new build (with underfloor heating). The substrate is cement screed.

After some initial research, I’m a bit confused about how to properly prepare the substrate and whether impact sound insulation is necessary (or is it only required for click vinyl?).

My questions:

1. Do I have to apply leveling compound over the entire screed surface before installing self-adhesive vinyl?

2. If yes: what happens to the expansion joints in the screed? How should I protect them?

3. What are the consequences if I skip the leveling compound?

4. After applying the leveling compound, do I install the self-adhesive vinyl directly, or should I add impact sound insulation first?

Many thanks in advance!
Vicky Pedia6 Mar 2020 21:50
JaAberNein schrieb:

Ok, good to know. Does it have an impact sound insulation layer integrated into the vinyl, or is it completely without?

I strongly suspect it is without insulation, and @Altai might be able to confirm.
seat886 Mar 2020 21:56
What definitely still needs to be considered: Click vinyl without an HDF core expands significantly. Therefore, it is very unsuitable for large south-facing windows.
Vicky Pedia6 Mar 2020 22:15
seat88 schrieb:

One important thing to keep in mind:
Click vinyl without an HDF backing expands a lot. Therefore, it is not suitable for large south-facing windows.

No! A classic 5mm (0.2 inch) gap to the wall is enough, and it fits perfectly. No need to worry. It does expand slightly, but that’s not a problem! Manufacturers are well aware of this!
seat887 Mar 2020 06:26
It depends on the length of the room... We had 9.5m (31 feet) and it was too hot for us ^^
A
Altai
7 Mar 2020 08:25
JaAberNein schrieb:

Ok, good to know. Does it have impact sound insulation integrated into the vinyl, or is it completely without?

Phew, I didn’t pay special attention to that, as it’s on the ground floor. But it really is very quiet! I think the thickness is 6mm (0.24 inches). It feels really comfortable to walk on.
Vicky Pedia10 Mar 2020 00:10
@Altai are we talking about standard click vinyl? Without knowing your house, I think it's more like 4mm (0.16 inches), or are we misunderstanding each other?
But combined with underfloor heating, it’s a great material, I agree with you!!! I had huge arguments with my ex about this versus tiles! She won’t read this, but by now I’m totally convinced. All correct!!!