We've built a number of patios, and walls, but have yet to replace an existing wall, so I'm looking for a little advise. Customer has approx 25'x40' brick patio which is buckling and shifting. One side has about a 3' high retaining wall using large landscape timbers which are rotted. He wants to replace them, but my concern is how to remove them without losing the back fill and that whole side of the patio. More than likely I imagine a good portion of the patio stones will end up having to be relaid. Im actually considering trying to convince the customer to upgrade that to pavers but one thing at a time. How do you pull a retaining wall without losing that portion of the pation?