1505.1 General.
BC § 1505.1
Roof assemblies shall be divided into the classes defined below. Class A, B and C roof assemblies and roof coverings required to be listed by this section shall be tested in accordance with ASTM E 108 or UL 790. In addition, fire-retardant-treated wood roof coverings shall be tested in accordance with ASTM D 2898. The minimum roof coverings installed on buildings shall comply with Table 1505.1 of this code based on the type of construction of the building. Exception: Skylights and sloped glazing that comply with Chapter 24 or Section 2610 of this code. Table 1505.1 a, bMinimum Roof Covering Classification for Types of Construction IA IB IIA IIB IIIA IIIB IV VA VB B B B B B B B B C b For SI: 1 foot = 304.8 mm, 1 square foot = 0.0929 m 2 a. Unless otherwise required due to the location of the building within a fire district in accordance with Section D102.2.3 in Appendix D. b. Buildings that are not more than two stories above grade plane and having not more than 6,000 square feet (557.4 m 2 ) of projected roof area and where there is a minimum 10-foot fire-separation distance from the leading edge of the roof to a lot line on all sides of the building, except for street fronts or public ways, shall be permitted to have roofs of No. 1 cedar or redwood shakes and No. 1 shingles in accordance with Section 1505.6.
