Posted 3/21/2014 20:55 (#3768030 - in reply to #3768010) Subject: RE: Sinkholes
North of London
I agree with the landscape cloth.
We spend money to put tile in to take excess water away so I would not want to cement up the great drainage 'system' you have.
The cloth will allow water to pass but not the soil.
Unless the cracks are very big 1 layer would do it.