§ Chapter 11 IRC 2018
Energy Efficiency
14 entries from Chapter 11 of IRC 2018, organized by section number. Each entry covers what the code requires, why it exists, what inspectors look for, and common mistakes.
§ 01 Sections
All 14 entries.
Sorted by section number. Click any row for the full entry — answer, requirements, edition diff, related sections.
Section
Title
Question
N1101.3
IRC 2018 Energy Code Compliance Paths Explained
N1101.3
Do I have to follow the prescriptive insulation table, or can I use REScheck, performance, or a HERS rating?
Do I have to follow the prescriptive insulation table, or can I use REScheck, performance, or a HERS rating?
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N1101.14
Energy Certificate Required at Certificate of Occupancy Under IRC 2018
N1101.14
Is an energy certificate required when a new house is completed?
Is an energy certificate required when a new house is completed?
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N1102.1
Insulation R-Values by Climate Zone Under IRC 2018
N1102.1
What R-value insulation do I need for walls, ceilings, floors, basement walls, slabs, and crawl spaces?
What R-value insulation do I need for walls, ceilings, floors, basement walls, slabs, and crawl spaces?
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N1102.1
What Does Continuous Insulation Mean in the IRC 2018 Energy Code?
N1102.1
What does continuous insulation mean in the IRC 2018 energy code?
What does continuous insulation mean in the IRC 2018 energy code?
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N1102.1.4
Energy Code Window-Wall Trade-Offs Under IRC 2018
N1102.1.4
Can I use better windows to make up for lower wall or attic insulation in the IRC 2018 energy code?
Can I use better windows to make up for lower wall or attic insulation in the IRC 2018 energy code?
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N1102.2.9
Basement Wall Insulation Under IRC 2018 Energy Code
N1102.2.9
Do basement walls need insulation under the IRC 2018 energy code?
Do basement walls need insulation under the IRC 2018 energy code?
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N1102.2.10
Slab Edge Insulation Requirements Under IRC 2018 Energy Code
N1102.2.10
When is slab edge insulation required, and how deep does it have to go?
When is slab edge insulation required, and how deep does it have to go?
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N1102.2.11
Crawl Space Insulation Under IRC 2018 Energy Code
N1102.2.11
Do I insulate the crawl space walls or the floor above the crawl space under the IRC 2018 energy code?
Do I insulate the crawl space walls or the floor above the crawl space under the IRC 2018 energy code?
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N1102.3
Window U-Factor and SHGC Requirements Under IRC 2018
N1102.3
What U-factor and SHGC do my windows and glass doors need for the IRC 2018 energy code?
What U-factor and SHGC do my windows and glass doors need for the IRC 2018 energy code?
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N1102.4
Blower Door Test Requirements Under IRC 2018
N1102.4
Is a blower door test required, and what ACH number does a new house have to pass?
Is a blower door test required, and what ACH number does a new house have to pass?
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N1102.4.1
Energy Code Air Sealing Inspection Checklist Under IRC 2018
N1102.4.1
What does the inspector look for on the energy code air sealing inspection?
What does the inspector look for on the energy code air sealing inspection?
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N1103.3
Duct Leakage Testing Requirements Under IRC 2018
N1103.3
Do my HVAC ducts need a duct leakage test for the IRC 2018 energy code?
Do my HVAC ducts need a duct leakage test for the IRC 2018 energy code?
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N1103.3.1
HVAC Duct Insulation Requirements Outside Conditioned Space Under IRC 2018
N1103.3.1
What R-value insulation is required for HVAC ducts in an attic, crawl space, garage, or outside conditioned space?
What R-value insulation is required for HVAC ducts in an attic, crawl space, garage, or outside conditioned space?
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N1103.6
Mechanical Ventilation Requirements for Tight Houses Under IRC 2018
N1103.6
If my house passes the blower door test, do I also need a fresh air system, ERV, HRV, or whole-house ventilation?
If my house passes the blower door test, do I also need a fresh air system, ERV, HRV, or whole-house ventilation?
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