I came across an insurance audit on the installation of ESFR sprinkler in a warehouse with ordinary hazards (NFPA 13). The roof of the warehouse is sloped to MORE than 2:12 (NFPA 13, Section 8.4.6.2).
This is not acceptable by the auditor.
Can someone help me please with the meaning of 2:12 slope ratio of NFPA 13 and what is suggestion to correct this situation?

Thanks a lot
Paul