ᐅ Concrete Staircase: How Much Covering Material?

Hello.

Our concrete staircase will later be covered with natural stone.
Is a covering thickness of 5cm (2 inches) correct or too much?
I have attached the staircase.

Thanks in advance.

Hello, I don’t have exact information about stone flooring. But just for reference, for wood flooring we are planning 4 cm (1.6 inches) for the wood plus 1.5 cm (0.6 inches) for the leveling/subfloor. So that would be similar to your planning.

Hello "bluminger".

Since the natural stone slabs are fixed directly onto the load-bearing substrate (the treads and risers of the concrete staircase) with cement mortar, the thickness of the material is actually of minor importance. A thickness of 50mm (2 inches) is certainly more than sufficient; at that thickness, the slabs would even be self-supporting! Theoretically, tiles as thin as 10mm (0.4 inches) would also serve the purpose here, if you want to consider the material thickness at this point.

Best regards, KlaRa

5cm (2 inches) natural stone as a covering?

Common thicknesses for natural stone are:
Window sills: 2-3cm (1 inch - inside usually 2cm (0.8 inch), outside usually 3cm (1.2 inches))
Kitchen countertop: 3-4cm (1.2 - 1.6 inches) (smaller ones 3cm (1.2 inches), larger ones 4cm (1.6 inches) plus number and size of openings)
Cantilevered natural stone stairs and possibly landings: 6cm (2.4 inches) (3+3 glued layers)