The use of wood shake and wood shingle roof covering materials for new construction, re-roofing, and repairs are prohibited. This prohibition includes wood shake and wood shingle roof covering materials with fire retardant treatments of any kind. Roof covering shall not be applied over exiting wood shake or wood shingle roof coverings.

Exception: Roof repairs of less than 25% of the total roof area on existing structures, in any one year period, may be repaired with a minimum Class B fire-rated wood shake or wood shingle material treated by the full-cell vacuum-pressure.