Energy Efficiency

Basement Wall Insulation Under IRC 2018 Energy Code

Do basement walls need insulation under the IRC 2018 energy code?

N1102.2.9

Blower Door Test Requirements Under IRC 2018

Is a blower door test required, and what ACH number does a new house have to pass?

N1102.4

Crawl Space Insulation Under IRC 2018 Energy Code

Do I insulate the crawl space walls or the floor above the crawl space under the IRC 2018 energy code?

N1102.2.11

Duct Leakage Testing Requirements Under IRC 2018

Do my HVAC ducts need a duct leakage test for the IRC 2018 energy code?

N1103.3

Energy Certificate Required at Certificate of Occupancy Under IRC 2018

Is an energy certificate required when a new house is completed?

N1101.14

Energy Code Air Sealing Inspection Checklist Under IRC 2018

What does the inspector look for on the energy code air sealing inspection?

N1102.4.1

Energy Code Window-Wall Trade-Offs Under IRC 2018

Can I use better windows to make up for lower wall or attic insulation in the IRC 2018 energy code?

N1102.1.4

HVAC Duct Insulation Requirements Outside Conditioned Space Under IRC 2018

What R-value insulation is required for HVAC ducts in an attic, crawl space, garage, or outside conditioned space?

N1103.3.1

Insulation R-Values by Climate Zone Under IRC 2018

What R-value insulation do I need for walls, ceilings, floors, basement walls, slabs, and crawl spaces?

N1102.1

IRC 2018 Energy Code Compliance Paths Explained

Do I have to follow the prescriptive insulation table, or can I use REScheck, performance, or a HERS rating?

N1101.3

Mechanical Ventilation Requirements for Tight Houses Under IRC 2018

If my house passes the blower door test, do I also need a fresh air system, ERV, HRV, or whole-house ventilation?

N1103.6

Slab Edge Insulation Requirements Under IRC 2018 Energy Code

When is slab edge insulation required, and how deep does it have to go?

N1102.2.10

What Does Continuous Insulation Mean in the IRC 2018 Energy Code?

What does continuous insulation mean in the IRC 2018 energy code?

N1102.1

Window U-Factor and SHGC Requirements Under IRC 2018

What U-factor and SHGC do my windows and glass doors need for the IRC 2018 energy code?

N1102.3