Floor covering on the step between the garage and outdoor area

Hi,

as you can see in the pictures, I have the following problem: the step is lower than my pavement. Now the question is, what kind of surface covering can be done in this situation? One possibility I have would be a natural stone slab and to sand it down at the front so that I can get over the pavement. However, I am unsure here because the natural stone slab may only be a maximum of 10mm thick in order to still be stable.

Well, the "problem" is actually not one. At least not an unsolvable one. Without wanting to go into further possibilities: since the natural stone slab that you mechanically "reworked" will later be glued directly onto the concrete substrate, the material thickness of 10mm is not a problem. This is because no bending moments can act on the natural stone under later compressive load from above. The natural stone immediately transfers the applied pressure through the adhesive layer to the concrete. That means: it will work the way you think. ---------------------- Good luck: KlaRa

and if I want the panel to cantilever about 10 to 20mm like on the windowsill, will that still be stable?

The answer to your question can be found in my post! There I wrote that the natural stone slab will later be glued in direct contact to the concrete substrate and as a result no bending stresses can occur. If the natural stone slab cantilevers at a thickness of 10mm, this edge will certainly break under load. Solution: support the cantilevering part with a compressive mortar strip.

support with a compressive strength mortar strip

this means: apply a strip of compressive strength mortar (which you can get at any hardware store) below the cantilever on the concrete (in case my explanation was not clear enough) and then place the natural stone slab on this.

I'll do it now without a cantilever and use tiles.