Under my concrete driveway there is a gap, what's the best way to fill it up? For now I have just placed pavers but would prefer a permanent (and better) solution).
Hello @smhok
It seems that the last batch of heavy rain has eroded the soil beside your concrete driveway. In order to shore it up, I suggest building a small retaining wall out of sleepers to prevent soil erosion in that part of the driveway. I also recommend putting in Vinidex 100mm x 20m Socked Slotted Draincoil inside the retaining wall to re-direct the water falling into it.
I've placed a sample sketch below to give you an idea of what it looks like and how you can build it.
If you have any questions about it, please let me know.
Eric