The aluminum rails are underpinned with construction protection mats up to 4.5 cm thick
If the ground is that uneven, there is no other option. I see it as absolutely uncritical. One could also have worked cleanly beforehand, so that only one pad each would have to be placed underneath...
The aluminum rails are underpinned with construction protection mats up to 4.5 cm thick. I believe 1-2 cm is usual. But that much seems strange to me.
That sounds to me like the first person created a slope and the second now wants to lay everything flat. I don't consider these "rubber wedge towers" to be really load-bearing.
Think about the bamboo again. One hears and reads quite a lot of negative things about bamboo terraces, such floorboards, for example, are said to splinter quickly. Long-tested and unproblematic would be larch, for example.