Section 9631 Of Article 2. Structural And Material Requirements Of Community Mausoleums And Columbariums From California Health And Safety Code >> Division 8. >> Part 5. >> Chapter 5. >> Article 2.

. Where any wall is constructed against a bank of earth, rock, or other porous material, or where crypts are adjacent to an outside building wall below grade, the wall shall be adequately waterproofed. Before backfilling, a waterproofed wall shall have a protection board placed against it to prevent damage to the waterproofing during backfilling.