Slab at Grade

The home is built directly on a concrete slab at grade or on ground.

Note: When entering this foundation type you must enter the following:

• Foundation Type including the percentage (must total at least 100 %)
• Foundation Material (concrete is the only suitable entry for Slab at Grade even though there are other options)

NOTE: Foundations Built on Unsatisfactory Soil Conditions

There are three additional Slab at Grade options for homes built on expandable soil, collapsible soil, or other subterranean conditions that warrant a stronger foundation. All of the additional foundations for Unsatisfactory Soil Conditions are constructed with concrete. Therefore, “Concrete” must be selected as the “Foundation Material”.

In order from better to worse soil condition, the additional three options are “Slab at Grade - Moderate Soil”, “Slab at Grade - Poor Soil”, and “Slab at Grade - Severe Soil”.

Additions to the standard Slab at Grade selection for each soil condition are as follows:

“Slab at Grade - Moderate Soil”includes Geotechnical Engineering to determine the prescriptive measures necessary to construct the foundation, reinforced concrete slab poured over void forms, over-digging of the foundation area to remove the unsatisfactory soil and replace it with good soil, and a 4’ deep reinforced concrete foundation wall under the perimeter of the slab.

“Slab at Grade - Poor Soil”includes Geotechnical Engineering to determine the prescriptive measures necessary to construct the foundation, reinforced concrete slab poured over void forms, and reinforced concrete caissons supporting reinforced concrete grade beams under the perimeter of the slab.

“Slab at Grade - Severe Soil”Geotechnical Engineering to determine the prescriptive measures necessary to construct the foundation, structural concrete slab poured over void forms, and concrete-filled steel micro piles supporting reinforced concrete grade beams under the perimeter of the slab.