Roof covers must be designed, installed, and maintained in accordance with the code and the manufacturer's instructions to protect the building or structure. Wooden shingles and slats can only be installed up to an average ceiling height of 33 feet (10 m), unless otherwise specified in the product approval. All roofing systems and prepared roof coverings must be installed on solid roofs, unless otherwise allowed in other sections of the code. Roof assemblies are accepted in the jurisdiction of this code, provided they meet the fire classification required for the structure they are installed in. Gaskets and metal terminations must be of the material and thickness described in sections 1517.6 and RAS 111 of this code, and must be designed and installed according to RAS 111. The minimum industry requirements and standards for roofing system installation are governed by chapter 15 of the Florida Building Code.
Valleys in BUR must be installed according to the manufacturer's literature for areas with strong winds, as well as according to the applicable details described in the product approval. When roof drains, drain drains, or overflow drains sized according to the Florida Building Code are required, the pipes must be installed with the inflow line located between 2 inches (51 mm) and 4 inches (102 mm) above the lowest point of the finished roof surface, excluding sinks. Joint covers must be installed to prevent moisture from entering through cladding joints, permeable materials at ceiling intersections, or parapet wall penetrations. Gutters and gutters placed outside buildings other than single-family homes, private garages, and type II-B construction buildings must be made of fireproof material or have a minimum of plastic tubes from List 40. Roofing felt must be mechanically fixed to a nachable platform with approved fasteners, followed by insulation installation on a solid asphalt mop. Walkways providing access must not be less than 24 inches (610 mm) wide and must have handrails as required for service platforms.
Ridge ventilation should not be installed without adequate ceiling ventilation to draw outside air through the ridge gap. Ventilation grilles should be installed to help expel moisture vapor when it may enter the roof assembly or moisture, as defined in Section 1521.12. An interlocking sheet of metal with an installed exposure to weather equal to or greater than three square feet per sheet is also required.
