Subfloor Preparation Click Vinyl

  • Erstellt am 2020-03-31 00:22:19

knalltüte

2020-05-17 21:21:22
  • #1
I believe this means that your floor covering should be pretty much exactly 10mm thick so that door frames etc. fit. Presumably, however, you are allowed, of course before construction begins, to inform if you plan significantly less or more floor covering thickness so that frames etc. can be adjusted accordingly in good time. A unevenness of 2cm will hardly be the case with the screed. But I don’t know what the DIN standard says about that. The specialist will surely be able to say something more precise.
 

KlaRa

2020-05-17 23:46:33
  • #2
"Thanks for the flowers", superzapp! It is indeed as you explained. In construction work, it is common to specify height measurements as negative and in mm because one always refers to the later ZERO line (with respect to the binding meter mark). -10mm thus means that with a standard thickness of the so-called smoothing compound of 2mm, 8mm remain for the top layer. No, it is indeed true that 20mm (i.e. 2cm) deviation no longer represents the limits of surface flatness. And smoothing (smoothing compound) is always necessary with elastic as well as textile floor coverings, but also with the click variants always. One reason for this is that the screed layer can only achieve the flatness of a screed according to line 3 of DIN 18202 (Table 3) with increased effort. It does not have to! It should not and cannot be relevant if complaints arise due to perhaps 200,--€ additional costs (for a smoothing compound) and, for cost savings, whatever the click method, it is simply applied directly to the screed. This will backfire. And very, very quickly. The saving possibly leads to "soft" zones in the usable plane when walked on and it crunches because the screed is breaking down (no fine smoothing compound was applied) and every step will be accompanied by a fine cracking noise. But a client can and may do that! Because he must live with the consequences he (consciously) caused - and, if necessary, also pay for the dismantling so that then someone who knows about floor technology carries out the covering installation. BUT: he (the client) will certainly not really save by not applying smoothing compound!! It has gotten late, good night to all! KlaRa
 

bazinga

2020-05-18 11:00:04
  • #3
Thank you very much for the clarification.

This means that after handing over the keys, the screed must be filled throughout the entire house. We are supposed to reach a height of 10mm with filling, insulating foil, and vinyl flooring; otherwise, adjustments must be made? I will have to have that done by an expert, as I am not familiar with it and the risks that it doesn't fit are too high for me regarding the floor. What approximate costs should be calculated for external contracting and an area to be worked on of just under 110m² (excluding bathrooms and basement)?

In the basement (50m²), we are considering laying Easyground flooring - does this also need to be filled beforehand? The basement slab is made of waterproof reinforced concrete. A perimeter insulation is installed below the slab. The basement is constructed as a "white tank" (usage class A). On the outside, a PMB waterproofing (plastic-modified bitumen thick coating) is applied in the joint area.
 

KlaRa

2020-05-18 11:41:38
  • #4

Yes, that's exactly right! At least if you work according to the recognized rules of the trade.

Yes, that's exactly right! The screed height was designed so that 10mm is reserved for the flooring build-up including auxiliary materials.

According to my knowledge, "Easyground" is a 2-component synthetic resin material applied at a rate of about 400g/m². So it is a sealant.
Whether or not to fill beforehand depends on the condition of the existing surface and the later expectations. Using a "bumpy piste" as living space is different from using this area as a hobby room.
Use class A has little to do with the build-up and indicates to the executing companies that this area must be sealed. Because a waterproof concrete is watertight even against pressure water, but cannot suppress water vapor diffusion (without sealing, the rooms would become unacceptably damp).
Regards: KlaRa
 

bazinga

2020-05-23 14:03:14
  • #5
I have continued to study the topic and want to understand the best approach when leveling a larger surface with liquid leveling compound.

Based on a build-up height of 10mm, I assume the following values:
- Vinyl flooring: 5mm (e.g., planeo Klickvinyl Grönland)
- Insulation foil: thickness 1.5mm (e.g., planeo Trittschalldämmung Silence)

This leaves a remaining height of 4.5mm for the filling compound. There is no underfloor heating. The screed is floating and consists of thermal insulation, separating layer, and cement screed.

Akit 203 self-leveling compound has a consumption of 1.5kg/sqm per mm layer thickness. For an area of 20sqm and a height of 4.5mm, this would be 135kg. For example, at 2mm height compensation, it would be 60kg of leveling compound. Per sqm, the leveling compound is thus cheaper than the insulation foil at the same height.

What is the best way to proceed when leveling floors with transitions? Seal the transition in room 1 with a wooden batten, level room 1 and let it dry. The next day, remove the wooden seal and level the rest of the room? Or can it be done in one step? The area to be processed is about 50sqm per floor.

Does the screed need a primer or bonding agent applied before applying the self-leveling compound?

Is anything missing in the general procedure: new-build screed (done by the developer) - clean and vacuum - level screed with self-leveling compound - install insulation foil - lay vinyl flooring - finished?
 

KlaRa

2020-05-23 17:21:40
  • #6
Hello "bazinga". There seems to be quite a bit of confusion in understanding. A vinyl floor in click version has a material thickness of 5mm. For a height of 10mm to be considered, the PE foil does not take up 1.5mm, but only 0.15mm thickness. A – as I think – big difference! So, there remain in fact 5mm minus the leveling compound. We have to consider those in a minimum thickness of 2mm. At 1.5kg/m², that would be about 3kg/m² of putty and thus about 60kg on 20m²! The PE foil is also not a seal but a vapor barrier. Although we do not need it as moisture protection for heterogeneous as well as homogeneous PVC coverings, it is quite usable as "creak protection". Back to the build-up height: If around 7mm of the 10mm were used up (covering + putty), 3mm residual height remain, which we can disregard. Because transition profiles always have to be used at room transitions with loose laying of floor coverings. And these easily compensate the 3mm. Work is always done continuously. Meaning: one floor level is completely covered with putty after the entire surface has been sanded (mandatory cleaning sanding), vacuumed, and primed on the surface using a roller method. Only then the putty, which must be deaerated with a spiked roller. A primer is also an adhesion bridge! My suggestion: better have all this done by a professional. Otherwise, it probably won’t work! And you won’t enjoy the top covering with a "bumpy" subfloor, which does not forgive such things. Reminder: Wives see that strictly and don’t forgive uneven floor elements .... Regards: KlaRa
 

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