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i just had a paver sunk in as i was walking over it. I did not trip so i am safe. But that made me look around and i saw some pavers have moved quite a bit attached photos. Also i tool some photos from below and looks like sand soil has just eroded but no sure where did it go as there was soil in all 4 directions.
2) secondly , i have these brick pavers adjacent to these pavers , which when pressure cleaned and sealed were all looking good but in 4 weeks they all have become discoloured and gone dark and i am not liking the look of it. Could this be from a leakage of water somewhere ?
Is there a bigger problem here ?
Hello @antrix_bansal
In the interest of health and safety I suggest not walking on your pavers for the meantime as parts of it may be compromised.
It appears that water has entered the sand base of your pavers and is slowly washing it away. This is why one of the pavers has sunk, the sand base was gone and only the paving sand at the sides was holding it up. In order to repair it properly, all the pavers must be removed and the source of the water leak must be addressed. Once the water leak is repaired the sand base can then be re-laid and the pavers can be put back in.
In regards to your discoloured pavers, it's possible that water has affected it as well. If water is present underneath the pavers mould could possibly infest the pavers. Thereby producing that dark stain on the surface. I suggest investigating and lifting a few pavers as well to see if the sand base is waterlogged. If it is, the source of the water again must be addressed.
Let me call on our experienced members @Dave-1 and @Nailbag for their recommendations.
If you need further assistance, please let us know.
Eric
The only way to find out is to track the pattern of the drain on your sand foundation. I suggest engaging the services of a leak detection specialist that offers thermal scanning. You will see the cooler parts of your paved walkway which will indicate where water is settling or passing through.
Eric
