A house might not have a crawl space for several structural, geographical, or economic reasons. Many modern homes are built on concrete slab foundations, which are cheaper, faster to pour, and eliminate the risk of subterranean pest infestations or moisture buildup. Conversely, homes in northern climates with deep frost lines or properties with sloping topography often feature full subterranean basements instead of shallow crawl spaces to maximize living area and utility space.
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