With space at a premium in many urban areas, developers are digging deeper foundations to increase the square footage of residential, commercial and mixed-use building projects

Where a hydrostatic pressure condition does not exist, dammproofing shall be provided and a base shall be installed under the floor and a drain installed around the foundation perimeter.

This section implies that a waterproofing application is completed when the site ground water table is maintained at an elevation of not less than 6 inches below the bottom of the ground slab.

Learn about Section 1807.1.3 Ground-Water Control and its appropriate code interpretation.

1807.1.3 Ground-water control. Where the ground-water table is lowered and maintained at an elevation not less than 6 inches (152 mm) below the bottom of the lowest floor, the floor and walls shall be dampproofed in accordance with Section 1807.2.