Re-roof with Class A or B roof covering material weighing less than 6 pounds per sq. ft. over existing solid sheathing 24 Squares. Class A roof covering is required within Very High Fire Hazard Severity Zone (VHFHSZ). For residential roof replacement > 50% of the total roof area, apply Cool Roof Product labeled and certified by Cool Roof Rating Council (CRRC). Cool Roof may be required for non-residential buildings per Title 24, Part 6, Section 141.0(b)2B.Remove existing roof tiles, apply new underlayment and reset roof tiles (Cool roof compliance is not required)Application of an approved coating to an existing roof.