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The exterior method involves excavating your walls down to the base(footings) of your home. In order quote with this method, you would need to measure the linear footage of the exterior wall. That is pretty much it. Although you need to keep in mind that additional costs may be applied depending on obstructions associated with the dig. Factors such as window wells, shrubs and trees, concrete, interlock, larger than average depths to the base of house (average depth to base of house is 5’-6’), soil composition(clay) and if the area that needs to excavated can support and has room for an excavator. If your foundation is cinderblock, it is necessary that that the entire wall is addressed because the walls are