Concrete or masonry foundations can be replaced with permanent wood foundation systems. A permanent wood foundation may be a viable option for repairing a damaged or degraded concrete foundation wall. If a house's permanent wood foundation is broken, the same material should be utilized to repair it. A permanent wood foundation system consists of a footing plate on a crushed stone base, followed by a plywood-sheathed stud wall. Several factors influence whether this stud wall should be built using 2x4, 2x6, or 2x8 lumber, including stud spacing and the number of stories.