Pier and beam foundations are elevated substructures that feature a crawlspace that typically houses plumbing and electrical utilities. Pier-and-beam foundations differ from slap foundations in that they do not rest directly on the ground.
In pier-and-beam foundations used In residential construction, the piers extend above ground level and rest on load-bearing wooden beams that support the weight of the structure. Additional stability is provided with a masonry frame or concrete beams that support the structure's exterior. Pier-and-beam foundations afford greater stability than slab construction for structures built on soft soil. Over time, repairs may be required should the wooden beams used in these foundations experience deterioration.