24 SQM Patio - how much materials needed ?

The mot 1 realistically is not an accurate amount as you should have 100mm depth, that would work out around 5- 6 tons. Most probably 5 would be more that adequate. The sand sand i would agree with and ide suggest around 15- 18 bags of cement for a strong mix. The slab gaps i would also disagree with using building sand and would suggest some kind of geo fix / grout as it holds better, is less messy and easier to maintain.

The above answer is about right I’ve been trading since 1980 and plenty of people have jumped on the Landscape game with no experience it makes me feel like I’m losing the battle against cowboys, please look at everything before you click the link thank you Regards Paul

Yes,I agree with the answer and definitely need a good solid base of mot and geo fix grout to avoid any staining on the slabs and is permeable, the last thing you want on a path or patio is sinking slabs,build a solid base and it'll be good for years to come.