Thanks for the advice..but I am a little confused....digging 2 meters
is not what I had in mind, nor do I think my foundation goes that deep.
Perhaps I am using the wrong terminology so I will explain more.
Currently there is the concrete foundation, next to which is a 2 foot
wide strip of stone. I dug up that stone and found a layer of plastic,
which I think is to stop roots form surfacing and weeds from
growing..also to keep water from soaking into the soil. Under the
plastic is soil and roots. If I dig a couple of inches of soil up,
there is a line on the concrete foundation where the tar starts and
continues into the ground (I ecpect this is to stop the concrete from
absorbing water). My house is from 1973 so I am not sure if this is
how it should have been done, but I would like to replace the plastic
layer and the stone only, but I worry that I should be doing more?