Specifying Weather-resistant Siding: Section 1405.16

Fiber cement siding complying with International Building Code (IBC) Section 1404.10, Fiber-cement Siding, shall be permitted on exterior walls of Types I, II, III, IV, and V construction for wind pressure resistance or wind speed exposures as indicated by the manufacturer’s listing and label and approved installation instructions. Where specified, the siding should be installed over sheathing or materials listed in Section 2304.6, and conform to the water-resistive barrier (WRB) requirements in Section 1403. Siding and accessories shall be installed in accordance with approved manufacturer’s instructions. Unless otherwise specified in the approved manufacturer’s instructions, nails used to fasten the siding to wood studs must be corrosion-resistant round head smooth shank and shall be long enough to penetrate the studs at least 25 mm (1 in.). The metal framing requires all-weather screws, which must penetrate the framing at least three full threads.

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