Construction of pavement on concrete slab

Hello everyone,

we have a basement ceiling that simultaneously serves as the base slab for our carport. Due to the sloping site, the ceiling is "open" on three sides. As the floor covering, we had planned paving stones, which extend completely to the house entrance on the left.

For the construction, I originally wanted to first weld roofing felt, then lay a gravel bed, and finally pave. On the open sides, gutter flashing sheets for water drainage on each side. A metal sealing has already been installed on the house side.

The question is whether this setup makes sense or if there are alternatives? Additionally, I would probably need special gutter flashing that drains water downwards and encloses the gravel bed upwards?

Hi,
first of all a stupid question: what was planned? Gravel bed and paving add quite a bit of weight, was that sufficiently considered for the ceiling?

How much height can you afford for the floor construction? The eaves sheet on the house doesn’t look very high, 20 cm of gravel plus 8 cm of paving won’t cover it.

The question will be how thick a gravel layer needs to be here. A talk with a professional is definitely advisable.

Could the paving possibly be "glued" like a tile?

Best regards,

Andreas

Actually, a garage was planned. I have now checked the statics. For the concrete ceiling, 6.25 kN/m² was assumed for the ceiling itself and an additional 1.50 kN/m² for the covering. Assuming 153 kg/m² per kN/m², that would be just under 6,400 kg for the area (layman’s opinion).

The eaves flashing is 17 cm high.

If I now add the 28 cm height mentioned by from the concrete ceiling, it will also become more difficult from the driveway side...

Do I even need a 20cm base layer for the pavement? Isn't the bedding layer enough? Since the carport is above, not much water is expected.