Fully enclosed area definition
Fully enclosed area means (a) an area where the net free openings in an exterior wall comprise less than 30 percent of the exposed wall under consideration. The exposed wall is the area within the boundaries described by the grade line, the vertical edges of the wall, and a horizontal line set at an elevation of 1 foot above the base flood elevation; or (b) any time the bottom edge of an opening, considered to be a portion of the net free opening area as described above, is located more than 1 foot above the grade line.