Had the sump on an outlet drain on our drive replaced many years ago. Past few weeks the paving slab nearest the drain started to wobble. We park the car on this part of the pavement. Then I noticed all the sand from under the slab was leaking out onto the pavment.
Now the slab is almost at an angle and I can't park the car on it. We are planning to get the whole drive replaced in about a year. What can I do in the meantime?
Is is just a case of buying a bag of something, lifting the slab and put it under....if so what do I need to buy...? sand mixtures of other stuff.
Appreciate any advice please