water above hardcore

[toby8]

my garden falls towards my house, ive built a retaining wall 5 course high and levelled it out. Im now in the process of doing a new patio area. I have dug down 150mm and started to clear the soil and put down hardcore, i intend to lay slabs on sharp sand and cement. But I Came down this morning after a heavy fall of rain and the water is laying above the hardcore. I can get rid of the rain water by diging a a deeper hole somewhere or by bucketing out but im worried that when dry and i lay slabs will after a few months the water get underneath and push them up??

 

[libby lou lou]

Sort the drainage out, if it didn't push the up they would be weakened in their fixtures being flooded then being walked on/ flood/walk/flood....

And the way the weather is going every year, you gotta take note.

 

[r896neo]

water will not push slabs up. i assume you had already plated the hardcore? when MOT type 1 is plated its relatively impervious to water because the surface is so tight so water tends to just sit there.

You need to remove surface water and let it dry out a bit. if you haven;t already compacted it then you need to let it dry out before doing that or it will turn into a swamp.

In summary- if its plated already just brush off the excess and let it dry out for a day.

If it hasn't been plated you need to wait for a couple of dry days in a row.