Base slab for carport or paving

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Currently, I am considering creating a concrete slab for the planned double carport 6x6 m and tool shed extension 6x3 m instead of laying concrete paving stones.

The idea came from the carpenter when he suggested building a continuous strip foundation from shuttering stones for the shed instead of individual point foundations, which would practically have to be sealed again at the bottom to the ground. And to keep all the wood away from dirt/snow/water, the shuttering stones 6x3 m as a rectangle and then the wooden construction on top.

So I thought, OK, just make a concrete slab out of it and throw in reinforcing steel mesh and concrete.

Now one thing leads to another, and I’m also considering putting the rest of the carport 6x6 m on a concrete slab.

The question is, does that make sense, and to what extent is a slab done as DIY better in terms of cost-effectiveness compared to paving.

My slab builder from the previous house construction said a
20 cm thick concrete slab in C 25-30 with reinforcing steel mesh would be sufficient. You could save on extra salt-resistant concrete or that would be a bit over the top.

What are your experiences, the whole driveway including carport with shed would otherwise be about 180 m2 to be paved; the rough substructure/frost protection from 0/32 is already sufficiently present and compacted multiple times.
So it would only need fine gravel plus paving on top, or partially the concrete slab on top.

Somehow I am completely torn here; on the one hand, I don’t see why I should spend 30-50€ per m2 just to drive over or park the car on it, on the other hand, we do not like the cheap solutions I know (grass grids, grids with gravel) optically at all.

If it were a garage, you could lay an inexpensive standard paving inside (gate closed out of sight, out of mind); with a carport, it gets more difficult because it is open. But a garage is no comparison anymore in terms of price to the carport.

Hi,

We also decided on a foundation for our metal garage 3 years ago and not on paving and point foundations.

The disadvantage is that you still have to cover the concrete slab. We tiled it; otherwise, the concrete wears away over time and water collects. Another disadvantage is that our slab is 6x9 meters in size and cannot be easily removed again. Heavy equipment would be required for that. You don't need to cover paving and can quickly dismantle it. Water can also infiltrate better.

Regards

If the:

the coarse base/frost protection made of 0/32 is already sufficient

I wouldn't do either but would just pour gravel or crushed stone on top and be done. Carport and shed with point foundations and for the shed either pave or screw terrace boards onto a beam structure. That's at least my plan...

so we had it paved by the landscaping gardener. The shed including the carport. Fits well and is easy to clean.

so we had it paved by the landscaping gardener.

Is that a warning device on/in the ground that is supposed to help when parking in reverse? - would you like to tell us more about it?

Hi, no, it's a simple marten repellent. It likes to visit me early in the morning. And additionally for me the "driveway boundary", not further, otherwise I would be in the next room. :) Works perfectly for me forwards and backwards.

P.S. the door gap is now closed, by the way. It just wasn't finished at that time.