Differences in building height: when is it a problem?

Hello everyone,

for our house construction project, the floors of some rooms are included in the price, the other rooms we are doing ourselves. We had to inform the screed installer about the heights we are planning in the rooms so that he can determine the screed height accordingly.

The rooms that will be done are being laid with adhesive vinyl from Joka (thickness 5 mm). For the other rooms, we initially specified a build-up height of 10 mm (we were not sure whether vinyl or laminate).

Now we want to lay click vinyl in the other rooms and come to a thickness of 6.5 mm (5 mm thickness + 1.5 mm impact sound insulation).

This would thus be a final difference of 3.5 mm between the room with click and the room with adhesive vinyl. Is this a problem (trip hazard) or is the difference still too small for that? I could of course also install a thicker impact sound insulation (e.g. 2.5 mm) with the click vinyl. Then the difference would be smaller. However, this again means poorer heat conduction of the underfloor heating due to more insulation.

3.5mm should easily be compensated over putty.

That sounds quite complicated. Wouldn't it be easier to increase the thickness of the impact sound insulation? Or maybe look again for click vinyl with 8.5mm thickness. Then you would have 1.5 mm impact sound insulation at exactly 10mm.

I agree. We have the same issue. Although we still have to do almost everything ourselves except for the bathroom and kitchen, which are tiled by the house builder. We specified a build-up height of 7mm, as many vinyl floors are around 5mm thick. (With underlay, it comes to about 7mm) But if we take a thicker floor covering, it can also be 9 or 10mm including underlay. So exactly the opposite compared to vaderle. But the height difference would only be noticeable in the kitchen, since it is an open kitchen to the living room. But doesn't there have to be a transition strip or something similar between the kitchen tiles and the living room floor covering to even out the height anyway?

I had the area of the transitions (i.e., where the 3.5 mm differences occur) extensively filled (approx. 3-4 sqm) in my last construction project. This way, I have no tripping edge, and the more than slight slope into the room was accepted by the client. This effectively bypasses the problem of heat conduction.