Adopts With Amendments
Chapter 9
Roof Assemblies
International Residential Code 2021
[F] 901.1 Application
Section 901.1 — Application. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] 901.1.1 Roof Assemblies IRC
Section 901.1.1 — Roof Assemblies IRC. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] 901.2 Roof Deck Requirements
Section 901.2 — Roof Deck Requirements. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] 901.2.1 Roof Covering Scope
Section 901.2.1 — Roof Covering Scope. This section establishes the scope, applicability, and administrative provisions for enforcement of this code. Refer to the official code text for complete requirements.
[F] 902.1 Roof Covering Materials
Section 902.1 — Roof Covering Materials. This section specifies construction material requirements and standards. Refer to the official code for specific material specifications and testing standards. Refer to the official code text for complete requirements.
[F] 902.1.1 Roof Covering Classification
Section 902.1.1 — Roof Covering Classification. This section establishes occupancy classification and use requirements that determine applicable building code provisions. Refer to the official code text for complete requirements.
[F] 902.2 Roof Covering Classification
Section 902.2 — Roof Covering Classification. This section establishes occupancy classification and use requirements that determine applicable building code provisions. Refer to the official code text for complete requirements.
[F] 903.1 Roof Covering Application
Section 903.1 — Roof Covering Application. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] 903.1.1 Roof Underlayment
Section 903.1.1 — Roof Underlayment. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] 903.2 Asphalt Shingles
Section 903.2 — Asphalt Shingles. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] 903.4 Ice Barrier - Roof
Section 903.4 — Ice Barrier - Roof. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] 904.1 Asphalt Shingles
Section 904.1 — Asphalt Shingles. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] 904.1.1 Roof Flashing
Section 904.1.1 — Roof Flashing. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] 905.1 Asphalt Shingle Installation
Section 905.1 — Asphalt Shingle Installation. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] 905.13 Built-Up Roofing
Section 905.13 — Built-Up Roofing. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] 905.14 Modified Bitumen Roofing
Section 905.14 — Modified Bitumen Roofing. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] 905.15 Single-Ply Membrane Roofing
Section 905.15 — Single-Ply Membrane Roofing. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] 905.2 Clay and Concrete Tile
Section 905.2 — Clay and Concrete Tile. This section specifies construction material requirements and standards. Refer to the official code for specific material specifications and testing standards. Refer to the official code text for complete requirements.
[F] 905.3 Metal Roof Shingles
Section 905.3 — Metal Roof Shingles. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] 905.7 Wood Shingles
Section 905.7 — Wood Shingles. This section specifies construction material requirements and standards. Refer to the official code for specific material specifications and testing standards. Refer to the official code text for complete requirements.
[F] 905.8 Wood Shakes
Section 905.8 — Wood Shakes. This section specifies construction material requirements and standards. Refer to the official code for specific material specifications and testing standards. Refer to the official code text for complete requirements.
[F] 906.1 Concrete and Clay Tile
Section 906.1 — Concrete and Clay Tile. This section specifies construction material requirements and standards. Refer to the official code for specific material specifications and testing standards. Refer to the official code text for complete requirements.
[F] 907.1 Metal Roof Panels
Section 907.1 — Metal Roof Panels. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] 908.1 Wood Shingles and Shakes
Section 908.1 — Wood Shingles and Shakes. This section specifies construction material requirements and standards. Refer to the official code for specific material specifications and testing standards. Refer to the official code text for complete requirements.
[F] 909.1 Built-Up Roofing
Section 909.1 — Built-Up Roofing. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] 910.1 Modified Bitumen Roofing
Section 910.1 — Modified Bitumen Roofing. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] 911.1 Thermoset Single-Ply Roofing
Section 911.1 — Thermoset Single-Ply Roofing. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] 912.1 Thermoplastic Single-Ply Roofing
Section 912.1 — Thermoplastic Single-Ply Roofing. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] 913.1 Spray Polyurethane Foam Roofing
Section 913.1 — Spray Polyurethane Foam Roofing. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] R901 General Roof Assemblies
Section R901 — General Roof Assemblies. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] R901.1 Scope - Roof Assemblies
Section R901.1 — Scope - Roof Assemblies. This section establishes the scope, applicability, and administrative provisions for enforcement of this code. Refer to the official code text for complete requirements.
[F] R901.1.1 Roof Assembly Scope
Section R901.1.1 — Roof Assembly Scope. This section establishes the scope, applicability, and administrative provisions for enforcement of this code. Refer to the official code text for complete requirements.
[F] R901.2 Roof Assemblies General
Section R901.2 — Roof Assemblies General. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] R901.3 Roof Covering Weather Protection
Section R901.3 — Roof Covering Weather Protection. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] R902 Fire Classification
Section R902 — Fire Classification. This section addresses fire protection and life safety requirements. Specific provisions depend on building type, occupancy, and construction classification. Refer to the official code text for complete requirements.
[F] R902.1 Roof Covering Classification
Section R902.1 — Roof Covering Classification. This section establishes occupancy classification and use requirements that determine applicable building code provisions. Refer to the official code text for complete requirements.
[F] R902.1.1 Roof Covering Classification
Section R902.1.1 — Roof Covering Classification. This section establishes occupancy classification and use requirements that determine applicable building code provisions. Refer to the official code text for complete requirements.
[F] R902.2 Roofing Classification
Section R902.2 — Roofing Classification. This section establishes occupancy classification and use requirements that determine applicable building code provisions. Refer to the official code text for complete requirements.
[F] R903 Weather Protection
Section R903 — Weather Protection. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] R903.1 Roof Drainage
Section R903.1 — Roof Drainage. This section covers plumbing system requirements. Specific sizing, materials, and installation methods are in the official code text. Refer to the official code text for complete requirements.
[F] R903.1.1 Roof Drainage
Section R903.1.1 — Roof Drainage. This section covers plumbing system requirements. Specific sizing, materials, and installation methods are in the official code text. Refer to the official code text for complete requirements.
[F] R903.2 Flashing
Section R903.2 — Flashing. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] R903.2.1 Flashing locations
Section R903.2.1 — Flashing locations. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] R903.2.2 Valley Flashing
Section R903.2.2 — Valley Flashing. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] R903.3 Roof Flashing
Section R903.3 — Roof Flashing. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] R903.3.1 Roof Underlayment
Section R903.3.1 — Roof Underlayment. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] R903.4 Roof Drainage
Section R903.4 — Roof Drainage. This section covers plumbing system requirements. Specific sizing, materials, and installation methods are in the official code text. Refer to the official code text for complete requirements.
[F] R904.1 Asphalt Shingles
Section R904.1 — Asphalt Shingles. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] R904.2 Asphalt Shingle Application
Section R904.2 — Asphalt Shingle Application. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] R904.3 Asphalt Shingle Slope
Section R904.3 — Asphalt Shingle Slope. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] R904.4 Wood Shingles and Shakes
Section R904.4 — Wood Shingles and Shakes. This section specifies construction material requirements and standards. Refer to the official code for specific material specifications and testing standards. Refer to the official code text for complete requirements.
[F] R904.5 Roll Roofing
Section R904.5 — Roll Roofing. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] R904.6 Slate Shingles
Section R904.6 — Slate Shingles. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] R904.7 Wood Shingles
Section R904.7 — Wood Shingles. This section specifies construction material requirements and standards. Refer to the official code for specific material specifications and testing standards. Refer to the official code text for complete requirements.
[F] R904.8 Wood Shakes
Section R904.8 — Wood Shakes. This section specifies construction material requirements and standards. Refer to the official code for specific material specifications and testing standards. Refer to the official code text for complete requirements.
[F] R905 Requirements for Roof Coverings
Section R905 — Requirements for Roof Coverings. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] R905.1 Roof Covering Application
Section R905.1 — Roof Covering Application. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] R905.1.1 Asphalt Shingle Requirements IRC
Section R905.1.1 — Asphalt Shingle Requirements IRC. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] R905.1.2 Asphalt Shingle Fastening
Section R905.1.2 — Asphalt Shingle Fastening. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] R905.10 Metal Roof Panels
Section R905.10 — Metal Roof Panels. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] R905.10.1 Metal Roof Panel IRC
Section R905.10.1 — Metal Roof Panel IRC. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] R905.11 Thermoplastic Single-Ply Roofing
Section R905.11 — Thermoplastic Single-Ply Roofing. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] R905.12 Thermoset Single-Ply Roofing
Section R905.12 — Thermoset Single-Ply Roofing. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] R905.13 Thermoplastic Single-Ply Roofing
Section R905.13 — Thermoplastic Single-Ply Roofing. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] R905.14 Photovoltaic Shingles
Section R905.14 — Photovoltaic Shingles. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] R905.15 Liquid-Applied Roofing
Section R905.15 — Liquid-Applied Roofing. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] R905.16 Photovoltaic Shingles and Tiles
Section R905.16 — Photovoltaic Shingles and Tiles. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] R905.2 Asphalt Shingles
Section R905.2 — Asphalt Shingles. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] R905.2.1 Asphalt Shingles - Sheathing Requirements
Section R905.2.1 — Asphalt Shingles - Sheathing Requirements. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] R905.2.2 Asphalt Shingles - Slope
Section R905.2.2 — Asphalt Shingles - Slope. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] R905.2.6 Ice Barrier
Section R905.2.6 — Ice Barrier. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] R905.2.7 Asphalt Shingles - Interlocking
Section R905.2.7 — Asphalt Shingles - Interlocking. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] R905.2.8 Ice Barrier - Asphalt Shingles
Section R905.2.8 — Ice Barrier - Asphalt Shingles. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] R905.3 Metal Roof Panels IRC
Section R905.3 — Metal Roof Panels IRC. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] R905.3.1 Clay and Concrete Tile IRC
Section R905.3.1 — Clay and Concrete Tile IRC. This section specifies construction material requirements and standards. Refer to the official code for specific material specifications and testing standards. Refer to the official code text for complete requirements.
[F] R905.4 Thermoplastic Single-Ply Roofing
Section R905.4 — Thermoplastic Single-Ply Roofing. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] R905.4.1 Metal Roof Panels - Deck Requirements
Section R905.4.1 — Metal Roof Panels - Deck Requirements. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] R905.5 Mineral-Surfaced Roll Roofing
Section R905.5 — Mineral-Surfaced Roll Roofing. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] R905.5.1 Standing seam metal roof
Section R905.5.1 — Standing seam metal roof. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] R905.6 Wood Shakes
Section R905.6 — Wood Shakes. This section specifies construction material requirements and standards. Refer to the official code for specific material specifications and testing standards. Refer to the official code text for complete requirements.
[F] R905.6.1 Slate shingles
Section R905.6.1 — Slate shingles. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] R905.7 Wood Shingles
Section R905.7 — Wood Shingles. This section specifies construction material requirements and standards. Refer to the official code for specific material specifications and testing standards. Refer to the official code text for complete requirements.
[F] R905.7.1 Wood Shingles - Deck Requirements
Section R905.7.1 — Wood Shingles - Deck Requirements. This section specifies construction material requirements and standards. Refer to the official code for specific material specifications and testing standards. Refer to the official code text for complete requirements.
[F] R905.8 Modified Bitumen Roofing
Section R905.8 — Modified Bitumen Roofing. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] R905.8.1 Wood Shakes - Deck Requirements
Section R905.8.1 — Wood Shakes - Deck Requirements. This section specifies construction material requirements and standards. Refer to the official code for specific material specifications and testing standards. Refer to the official code text for complete requirements.
[F] R905.9 Modified Bitumen Roofing
Section R905.9 — Modified Bitumen Roofing. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] R906.1 Roof Ventilation - Attics
Section R906.1 — Roof Ventilation - Attics. This section addresses mechanical system requirements including ventilation, ductwork, and equipment specifications. Refer to the official code text for complete requirements.
[F] R906.2 Ventilation Area
Section R906.2 — Ventilation Area. This section addresses mechanical system requirements including ventilation, ductwork, and equipment specifications. Refer to the official code text for complete requirements.
[F] R906.3 Vent Openings
Section R906.3 — Vent Openings. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] R907.1 Reroofing — General
Section R907.1 — Reroofing — General. This section establishes specific code requirements. Refer to the official code text for detailed provisions, exceptions, and referenced standards. Refer to the official code text for complete requirements.
[F] R908.1 Wood Shingles
Section R908.1 — Wood Shingles. This section specifies construction material requirements and standards. Refer to the official code for specific material specifications and testing standards. Refer to the official code text for complete requirements.
[F] R908.2 Wood Shakes
Section R908.2 — Wood Shakes. This section specifies construction material requirements and standards. Refer to the official code for specific material specifications and testing standards. Refer to the official code text for complete requirements.
Code sections are sourced from the International Code Council (ICC) and NFPA. Refer to ICC Digital Codes or NFPA for the authoritative source documents.