Amend this section by revising the first sentence to read as follows:

Except where required by Section R406.2 to be water proofed, foundation walls that retain earth and enclose interior spaces and floors below grade shall be damp-proofed from the top of the footing to 6 inches above finished grade.

Amend this section by adding exception 2 to read as follows:

2. Crawl space foundation walls or walls backfilled on both sides, such as those used in conjunction with a “slab on grade”, do not require damp-proofing.