My block paving driveway is on a slope. The lower end sunk long ago so the rainwater collects in a big puddle.
I am (finally) lifting and shifting the blocks and sand bed with the intention of adding and compressing more material to raise the level, and put them back.
I was expecting to find type 1 under there but the sand layer was essentially put straight onto an uneven concrete base.
So my question is what material can I use straight onto concrete to compress down and raise this driveway level? At its worse it needs a good few inches.
Some have suggested gravel / much smaller stones than MOT type 1 because that will compress better against the already hard concrete. Then sand compressed, then blocks tampered finally back.
Any other suggestions?
