For a damp climate, a concrete slab foundation is better, but if your house rests on a flood-prone area or sees a lot of rain, a crawl space is ideal. A crawl space foundation that is well-protected is less likely to get flooded, unlike a slab foundation, which can transfer water through the slab.

A slab foundation allows entry to the home from ground level, while a crawl space foundation usually has steps or a ramp to the door. A slab foundation is a flat concrete surface, while a crawl space foundation can have wood beams or concrete walls.