Distance between the substructure of massy wooden planks and the wall

Yes, thanks, interesting to see.

Our problem is that our floor slab is not even, I am currently looking for a suitable material for height compensation. Someone recommended rubber pads for terrace construction to me, but I actually don't want to use those indoors, as far as I know they are made from pollutant-laden old tires.

Does anyone have an idea, I need to compensate between 0.5 and 2.5 cm?

Does anyone have an idea, I need to compensate between 0.5 and 2.5 cm?

We used mounting wedges for that.

Yes, thanks, interesting to see.

Our problem is that our floor slab is not level, I am currently looking for a suitable material for height adjustment. Someone recommended rubber pads for terrace construction to me, but I actually don't want to use those indoors, as far as I know they are made from pollutant-laden used tires.

Does anyone have an idea? I need to compensate between 0.5 and 2.5 cm?

Maybe a leveling compound or cork. Although I wouldn't worry about a few pieces. I believe that in new builds/renovations, such amounts of materials are used that are all contaminated in some way. Doors are painted or coated, the entire kitchen as well, concrete, screed, carpets, plaster, wall paint, etc. Ultimately, you also have to feel comfortable. These insulation strips were not my first choice either, since we generally paid attention to ecological compatibility, but they were available and that was at least my explanation to myself. It also depends on the length over which you have this 2 cm difference, I would measure that when I have a few beams laid out. Provided you have enough build-up height, you can consider the solution from and compensate with a lower, thicker beam layer; then you would need significantly fewer supports.

Plastic wedges are a good idea, I think I find them better than the rubber pads, were the small wedges used for window construction at your place, or larger wedges?

I had also thought about cork pads, but I am unsure whether they will hold up over the years.

The wedges were relatively small... maybe about 6x6 cm... Here are some pictures again... in one I zoomed in for visibility. The light blue and black are the wedges. At the very bottom is the semi-finished result. We have been living in it for over 7 years now and the floorboards have no flaws.

When building terraces, bags filled with (raw) concrete or cement are often used; I could imagine that this would also be a feasible option here. It hardens sooner or later through the ambient humidity and becomes solid even if the bag eventually decomposes.