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Class B roof coverings shall be of fire-resistive material, approved by the building commissioner after satisfactory evidence that it is effective against moderate fire exposures. Under such exposures, Class B roof coverings shall not be readily flammable; shall not readily carry or communicate fire, shall afford a moderate degree of heat insulation to the roof deck; shall not slip from position; shall possess no flying brand hazard: and shall require only infrequent repairs to maintain their fire-resistive properties.
(Prior code § 65-7.2; Amend Coun. J. 3-5-03, p. 104990, § 43; Amend Coun. J. 11-13-07, p. 14999, Art. II, § 1)