Building envelope, energy efficiency, and special construction
Domain 5 covers the building envelope, energy efficiency, and special construction. The exam tests whether you can verify envelope performance and coordinate special systems without treating them as separate from the building code.
Energy efficiency
Chapter 13 adopts the commercial provisions of the International Energy Conservation Code. Requirements include envelope insulation, fenestration U-factor and solar heat gain coefficient, continuous air barriers, and mechanical and lighting controls. The inspector verifies envelope continuity at joints and penetrations, not just the insulation label.
Exterior walls and roofs
Chapter 14 regulates exterior wall envelopes for weather resistance, flashing, and water-resistive barriers. Chapter 15 regulates roof assemblies, roof coverings, and fire classification. Walls must drain and flash at openings, roof-wall intersections, and penetrations.
Special construction
Chapters 26 through 31 cover plastic, electrical, mechanical, plumbing, elevators, and special structures. Elevator hoistways, machine rooms, and penthouses have specific fire-resistance and access requirements. The inspector coordinates these systems with the architectural and structural drawings.
Worked example
A new storefront has large fixed glazing. The energy code sets a maximum U-factor and SHGC for the fenestration. The inspector checks the manufacturer's label and the approved plans, then verifies that the air barrier is continuous around the frame and that flashing drains water to the exterior. Aesthetic acceptance is not the test; code compliance is.
Traps
Treating Chapter 13 as advisory; checking insulation R-value but not air barrier continuity; missing roof flashing at parapets; assuming elevator penthouses are exempt from fire-resistance requirements.