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// CODE SNIPPET

1507.5 Metal Roof Shingles

Building Code 2018 of Illinois > 15 Roof Assemblies and Rooftop Structures > 1507 Requirements for Roof Coverings > 1507.5 Metal Roof Shingles
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The installation of metal roof shingles shall comply with the provisions of this section.

1507.5.1 Deck Requirements

Metal roof shingles shall be applied to a solid or closely fitted deck, except where the roof covering is specifically designed to be applied to spaced sheathing.

1507.5.2 Deck Slope

Metal roof shingles shall not be installed on roof slopes below three units vertical in 12 units horizontal (25-percent slope).

1507.5.3 Underlayment

Underlayment shall comply with Section 1507.1.1.

1507.5.4 Ice Barrier

Where required, ice barriers shall comply with Section 1507.1.2.

1507.5.5 Material Standards

Metal roof shingle roof coverings shall comply with Table 1507.4.3(1). The materials used for metal-roof shingle roof coverings shall be naturally corrosion resistant or provided with corrosion resistance in accordance with the standards and minimum thicknesses specified in the standards listed in Table 1507.4.3(2).

1507.5.6 Attachment

Metal roof shingles shall be secured to the roof in accordance with the approved manufacturer's installation instructions.

1507.5.7 Flashing

Roof valley flashing shall be of corrosion-resistant metal of the same material as the roof covering or shall comply with the standards in Table 1507.4.3(1). The valley flashing shall extend not less than 8 inches (203 mm) from the centerline each way and shall have a splash diverter rib not less than 3/4 inch (19.1 mm) high at the flow line formed as part of the flashing. Sections of flashing shall have an end lap of not less than 4 inches (102 mm). In areas where the average daily temperature in January is 25°F (-4°C) or less or where there is a possibility of ice forming along the eaves causing a backup of water, the metal valley flashing shall have a 36-inch-wide (914 mm) underlayment directly under it consisting of either one layer of underlayment running the full length of the valley or a self-adhering polymer-modified bitumen sheet bearing a label indicating compliance with ASTM D1970, in addition to underlayment required for metal roof shingles. The metal valley flashing underlayment shall be solidly cemented to the roofing underlayment for roof slopes under seven units vertical in 12 units horizontal (58-percent slope) or self-adhering polymer-modified bitumen sheet shall be installed.

Related Code Sections


1504.3.3 Roof Assemblies and Rooftop Structures, Metal Roof Shingles
Metal roof shingles applied to a solid or closely fitted deck shall be tested in accordance with ASTM D3161, FM 4474, UL 580 or UL 1897. Metal roof ...
Building Code 2018 of Illinois > 15 Roof Assemblies and Rooftop Structures > 1504 Performance Requirements > 1504.3 Wind Resistance of Nonballasted Roofs > 1504.3.3 Metal Roof Shingles
1507.5 Roof Assemblies and Rooftop Structures, Metal Roof Shingles
The installation of metal roof shingles shall comply with the provisions of this section ...
Building Code 2018 of Illinois > 15 Roof Assemblies and Rooftop Structures > 1507 Requirements for Roof Coverings > 1507.5 Metal Roof Shingles
1507.5.3 Roof Assemblies and Rooftop Structures, Underlayment
Underlayment shall comply with Section 1507.1.1 ...
Building Code 2018 of Illinois > 15 Roof Assemblies and Rooftop Structures > 1507 Requirements for Roof Coverings > 1507.5 Metal Roof Shingles > 1507.5.3 Underlayment
1507.5.4 Roof Assemblies and Rooftop Structures, Ice Barrier
Where required, ice barriers shall comply with Section 1507.1.2 ...
Building Code 2018 of Illinois > 15 Roof Assemblies and Rooftop Structures > 1507 Requirements for Roof Coverings > 1507.5 Metal Roof Shingles > 1507.5.4 Ice Barrier
1504.3 Roof Assemblies and Rooftop Structures, Wind Resistance of Nonballasted Roofs
Metal roof shingles applied to a solid or closely fitted deck shall be tested ...
Building Code 2018 of Illinois > 15 Roof Assemblies and Rooftop Structures > 1504 Performance Requirements > 1504.3 Wind Resistance of Nonballasted Roofs
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