Adopts With Amendments
Chapter 23
Gypsum Board and Plaster
International Residential Code 2021
[F] 2301.1 Solar Thermal Energy Systems - Scope
Section 2301.1 — Solar Thermal Energy Systems - 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] 2301.1.1 Water Supply General
Section 2301.1.1 — Water Supply General. 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] 2301.1.2 Minimum Pressure
Section 2301.1.2 — Minimum Pressure. 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] 2301.1.3 Pipe Materials
Section 2301.1.3 — Pipe Materials. 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] 2301.1.4 Support and Hanger Spacing
Section 2301.1.4 — Support and Hanger Spacing. 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] 2301.1.5 Water Service Pipe
Section 2301.1.5 — Water Service Pipe. 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] 2301.2 Solar Thermal - System Requirements
Section 2301.2 — Solar Thermal - System Requirements. This section addresses energy conservation requirements including thermal performance and building envelope specifications. Refer to the official code text for complete requirements.
[F] 2301.2.1 Solar Energy Systems Scope
Section 2301.2.1 — Solar Energy Systems 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] 2301.3 Solar Collectors
Section 2301.3 — Solar Collectors. 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] 2301.4 Heat Transfer Fluids
Section 2301.4 — Heat Transfer Fluids. 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] 2301.5 Pressure Relief
Section 2301.5 — Pressure Relief. 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] 2302.1 Solar Thermal Systems
Section 2302.1 — Solar Thermal Systems. This section addresses energy conservation requirements including thermal performance and building envelope specifications. Refer to the official code text for complete requirements.
[F] 2302.1.1 Solar Photovoltaic Panel Installation
Section 2302.1.1 — Solar Photovoltaic Panel 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] 2303.1 Photovoltaic Systems
Section 2303.1 — Photovoltaic Systems. 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] 2303.1.1 Factory-Built Fireplace Requirements
Section 2303.1.1 — Factory-Built Fireplace Requirements. 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] 2906 Water Supply Materials
Section 2906 — Water Supply Materials. 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] G2401.1 Scope - Fuel Gas
Section G2401.1 — Scope - Fuel Gas. This section establishes the scope, applicability, and administrative provisions for enforcement of this code. Refer to the official code text for complete requirements.
[F] G2401.2 Fuel Gas General
Section G2401.2 — Fuel Gas General. This section covers fuel gas piping and equipment requirements. Refer to the official code text for complete requirements.
[F] G2402.1 Definitions
Section G2402.1 — Definitions. This section provides definitions relevant to the code. Defined terms have specific meanings that affect how requirements are applied throughout the code. Refer to the official code text for complete requirements.
[F] G2403.1 General Provisions
Section G2403.1 — General Provisions. 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] G2404.1 Gas Piping General
Section G2404.1 — Gas Piping General. This section covers fuel gas piping and equipment requirements. Refer to the official code text for complete requirements.
[F] G2411.1 Fuel Gas - Electrical Bonding
Section G2411.1 — Fuel Gas - Electrical Bonding. This section covers electrical installation requirements. Specific conductor sizing, circuit protection, and installation methods are in the official code. Refer to the official code text for complete requirements.
[F] G2412.1 Gas Pipe Materials
Section G2412.1 — Gas Pipe Materials. 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] G2413.1 Pipe Sizing
Section G2413.1 — Pipe Sizing. 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] G2414.1 Pipe Joints
Section G2414.1 — Pipe Joints. 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] G2415.1 Fuel Gas - Piping Materials
Section G2415.1 — Fuel Gas - Piping 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] G2415.2 Support Intervals
Section G2415.2 — Support Intervals. 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] G2417.1 Testing
Section G2417.1 — Testing. 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] G2417.2 Test Pressure
Section G2417.2 — Test Pressure. 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] G2417.4 Prohibited Locations
Section G2417.4 — Prohibited 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] G2418.1 Purging Requirements
Section G2418.1 — Purging 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] G2418.2 Test Duration
Section G2418.2 — Test Duration. 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] G2419.1 Shutoff Valves
Section G2419.1 — Shutoff Valves. 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] G2420.1 Gas Shutoff Valves
Section G2420.1 — Gas Shutoff Valves. This section covers fuel gas piping and equipment requirements. Refer to the official code text for complete requirements.
[F] G2421.1 Sediment Traps
Section G2421.1 — Sediment Traps. 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] G2422.1 Gas Appliance Installation
Section G2422.1 — Gas Appliance Installation. This section covers fuel gas piping and equipment requirements. Refer to the official code text for complete requirements.
[F] G2425.1 Venting of Gas Appliances
Section G2425.1 — Venting of Gas Appliances. This section covers fuel gas piping and equipment requirements. Refer to the official code text for complete requirements.
[F] G2425.2 Vent Termination Location
Section G2425.2 — Vent Termination Location. 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] G2425.3 Direct Vent Appliances
Section G2425.3 — Direct Vent Appliances. 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] G2425.8 Vent Termination
Section G2425.8 — Vent Termination. 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] G2426.1 Vent Connector Slope
Section G2426.1 — Vent Connector 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] G2427.1 Power Vented Appliances
Section G2427.1 — Power Vented Appliances. 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] G2432.1 Gas Decorative Appliances
Section G2432.1 — Gas Decorative Appliances. This section covers fuel gas piping and equipment requirements. Refer to the official code text for complete requirements.
[F] G2433.1 Log Lighters
Section G2433.1 — Log Lighters. 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] G2434.1 Gas-Fired Central Furnaces
Section G2434.1 — Gas-Fired Central Furnaces. 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] G2435.1 Clothes Dryers
Section G2435.1 — Clothes Dryers. 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] G2436.1 Gas Cooking Appliances
Section G2436.1 — Gas Cooking Appliances. This section covers fuel gas piping and equipment requirements. Refer to the official code text for complete requirements.
[F] G2437.1 Pool Heaters
Section G2437.1 — Pool Heaters. 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] G2438.1 Forced-Air Warm-Air Furnaces
Section G2438.1 — Forced-Air Warm-Air Furnaces. 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] G2439.1 Gas Water Heaters
Section G2439.1 — Gas Water Heaters. 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] G2440.1 Gas Fireplaces
Section G2440.1 — Gas Fireplaces. 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] G2445.1 Unvented Heaters
Section G2445.1 — Unvented Heaters. 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] G2448.1 Outdoor Gas Appliances
Section G2448.1 — Outdoor Gas Appliances. This section covers fuel gas piping and equipment requirements. Refer to the official code text for complete requirements.
[F] M2301.1 Solar Thermal IRC
Section M2301.1 — Solar Thermal IRC. This section addresses energy conservation requirements including thermal performance and building envelope specifications. Refer to the official code text for complete requirements.
[F] M2301.2 Solar Thermal Installation
Section M2301.2 — Solar Thermal Installation. This section addresses energy conservation requirements including thermal performance and building envelope specifications. Refer to the official code text for complete requirements.
[F] M2301.3 Solar thermal piping
Section M2301.3 — Solar thermal piping. This section addresses energy conservation requirements including thermal performance and building envelope specifications. Refer to the official code text for complete requirements.
[F] M2401.1 Geothermal Energy Systems - Scope
Section M2401.1 — Geothermal Energy Systems - 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] N1101.1.1 Energy Efficiency Scope
Section N1101.1.1 — Energy Efficiency 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] N1101.2.1 Compliance Paths
Section N1101.2.1 — Compliance Paths. 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] N1102.1.1 Insulation and Fenestration Criteria
Section N1102.1.1 — Insulation and Fenestration Criteria. This section addresses energy conservation requirements including thermal performance and building envelope specifications. Refer to the official code text for complete requirements.
[F] N1102.2.1 Specific Insulation Details
Section N1102.2.1 — Specific Insulation Details. This section addresses energy conservation requirements including thermal performance and building envelope specifications. Refer to the official code text for complete requirements.
[F] N1102.3.1 Fenestration Requirements
Section N1102.3.1 — Fenestration 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] N1102.4.1 Air Leakage Details
Section N1102.4.1 — Air Leakage Details. 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] N1103.1.1 HVAC Equipment Sizing
Section N1103.1.1 — HVAC Equipment Sizing. This section addresses mechanical system requirements including ventilation, ductwork, and equipment specifications. Refer to the official code text for complete requirements.
[F] N1103.2.1 Duct Sealing Requirements
Section N1103.2.1 — Duct Sealing Requirements. This section addresses mechanical system requirements including ventilation, ductwork, and equipment specifications. Refer to the official code text for complete requirements.
[F] P2301.1 Scope - Piping Support
Section P2301.1 — Scope - Piping Support. This section establishes the scope, applicability, and administrative provisions for enforcement of this code. Refer to the official code text for complete requirements.
[F] P2301.1.1 Fixture Requirements General
Section P2301.1.1 — Fixture Requirements 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] P2301.2 General Plumbing Fixture Requirements
Section P2301.2 — General Plumbing Fixture Requirements. 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] P2302.1 Support Intervals
Section P2302.1 — Support Intervals. 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] P2303.1 Hangers and Anchors
Section P2303.1 — Hangers and Anchors. 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] P2501.1 Plumbing General Scope IRC
Section P2501.1 — Plumbing General Scope IRC. This section establishes the scope, applicability, and administrative provisions for enforcement of this code. Refer to the official code text for complete requirements.
[F] P2901 Water Supply and Distribution
Section P2901 — Water Supply and Distribution. 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] P2901.1 Scope - IRC Water Supply
Section P2901.1 — Scope - IRC Water Supply. This section establishes the scope, applicability, and administrative provisions for enforcement of this code. Refer to the official code text for complete requirements.
[F] P2902.1 Backflow Prevention
Section P2902.1 — Backflow Prevention. 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] P2903 Water Supply System
Section P2903 — Water Supply System. 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] P2903.1 Water Supply System Design
Section P2903.1 — Water Supply System Design. 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] P2903.2 Maximum pressure
Section P2903.2 — Maximum pressure. 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] P2903.3 Water Supply Pipe Sizing
Section P2903.3 — Water Supply Pipe Sizing. 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] P2904 Dwelling Unit Fire Sprinkler Systems
Section P2904 — Dwelling Unit Fire Sprinkler Systems. 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] P2904.1 Fire Sprinkler Systems in Dwellings
Section P2904.1 — Fire Sprinkler Systems in Dwellings. 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] R2301.1 Solar Thermal Energy Systems - Scope
Section R2301.1 — Solar Thermal Energy Systems - 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] R2301.2 Roof-Mounted Solar
Section R2301.2 — Roof-Mounted Solar. 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] R2301.3 Masonry Fireplaces
Section R2301.3 — Masonry Fireplaces. 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] R2302.1 Heat Transfer Fluid
Section R2302.1 — Heat Transfer Fluid. 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] R2302.2 Pressure Relief
Section R2302.2 — Pressure Relief. 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] R2302.3 Flashing
Section R2302.3 — 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] R2303.2 Wood Siding
Section R2303.2 — Wood Siding. 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] R2303.3 Wood Shingle Siding
Section R2303.3 — Wood Shingle Siding. 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] R2304.2 Vinyl Siding
Section R2304.2 — Vinyl Siding. 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] R2304.3 Fiber Cement Siding
Section R2304.3 — Fiber Cement Siding. 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] R2305.2 Masonry Veneer
Section R2305.2 — Masonry Veneer. 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] R2305.3 Stucco
Section R2305.3 — Stucco. 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] R2306.1 EIFS Installation
Section R2306.1 — EIFS 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] R2306.2 EIFS Water Resistance
Section R2306.2 — EIFS Water Resistance. 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] R602.10 Wall bracing
Section R602.10 — Wall bracing. 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] R602.2 Lumber grades
Section R602.2 — Lumber grades. 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] R602.3 Design and construction
Section R602.3 — Design and construction. 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] R602.4 Interior load-bearing walls
Section R602.4 — Interior load-bearing walls. This section covers structural design and loading requirements. Specific values and calculation methods are defined in the official code text. Refer to the official code text for complete requirements.
[F] R602.5 Interior nonbearing walls
Section R602.5 — Interior nonbearing walls. 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] R602.6 Drilling and notching studs
Section R602.6 — Drilling and notching studs. 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] R602.7 Headers
Section R602.7 — Headers. 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] R602.8 Fireblocking
Section R602.8 — Fireblocking. 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] R602.9 Cripple walls
Section R602.9 — Cripple walls. 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.
Code sections are sourced from the International Code Council (ICC) and NFPA. Refer to ICC Digital Codes or NFPA for the authoritative source documents.