A slab-on-grade foundation is a type of foundation consisting of a structural concrete slab poured onto the ground,
but usually, there is a layer of gravel and a vapor retarder between the ground and concrete. View illustration of a
slab-on-grade installation. No accessible space exists in slab-on-grade construction. Slab-on-grade foundations are
popular in areas where there is a high water table. For example, there are very few full basements in Southern
Florida. In general terms, a slab-on-grade foundation is poured on the grade or ground. complements of InterNachi @
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