Appendix R is adopted and added to read:

Appendix R Roofs

SECTION R101 GENERAL

R101.1 Scope. Applications for the construction or remodel of any buildings shall be subject to the roofing conditions of this Appendix when conditioned by the Fire Code Official.

R101.2 Conflicting Sections. Where provisions in this Appendix conflict with other sections of this Code or other appendices, the provisions of this Appendix shall prevail unless otherwise directed by the Fire Code Official.

SECTION R102 NEW BUILDINGS

R102.1 General. (FIRE 026). Roofing requirements for all new buildings shall be a minimum Class “B” roof assembly as defined by the International Building Code.

EXCEPTION: Greenhouses shall be exempt from the requirements of this Section.

R102.2 Very High Hazard Severity Zones. (FIRE 027). Roofing requirements for all new buildings in Very High Hazard Severity Zones shall be a minimum Class “A” roof assembly as defined by the International Building Code.

SECTION R103 EXISTING BUILDINGS

R103.1 General. (FIRE 026). Roofing requirements for existing buildings when fifty percent (50%) or more of the roof area is reroofed within a one-year period after the issuance of a building permit shall be a minimum Class “B” roof assembly as defined by the California Building Code. Where there is no permit issued, this section is applicable to buildings constructed after the effective date of this code and to buildings where fifty percent (50%) or more of the roof area is reroofed within a one-year period after commencing construction.

R103.2 Very High Hazard Severity Zone. (FIRE 027). Roofing requirements for existing buildings within a very high hazard severity zone when fifty percent (50%) or more of the roof area is reroofed within a one-year period after the issuance of a building permit shall be a minimum Class “A” roof assembly as defined by the International Building Code. Where there is no permit issued, this Section is applicable to such buildings constructed after the effective date of this code and to buildings where fifty percent (50%) or more of the roof area is reroofed within a one-year period after commencing construction.

SECTION R104 ADDITIONS TO EXISTING BUILDINGS

R104.1 General. The requirements of this Appendix shall apply to all additions to existing buildings, except that only the new portions of the roof shall be required to meet the requirements of this Appendix.