Slab Advantages Homes built on slabs have less risk of flooding or leaking gases, which creates a healthier environment than homes built over crawl spaces and basements that are susceptible to flooding, gas leaks and mold. Slabs often eliminate the need for extra steps because they are lower to the ground. Senior citizens or people with physical restrictions are attracted to one-level homes that don't have a lot of steps to climb. Slab Disadvantages Shifting soil, invasive tr