1807.1.1 Story Above Grade

Where a basement or cellar is considered a story above grade and the finished ground level adjacent to the basement or cellar wall is below the basement or cellar floor elevation for 25 percent or more of the perimeter, the floor and walls shall be dampproofed in accordance with Section 1807.2 and a foundation drain shall be installed in accordance with Section 1807.4.2. The foundation drain shall be installed around the portion of the perimeter where the basement or cellar floor is belowground level. The provisions of Sections 1807.3 and 1807.4.1 shall not apply in this case.