QII Inspection Process: What to Expect From Start to Finish

For builders new to Quality Insulation Installation (QII), understanding the field-verification sequence helps the team protect access, documentation, and the drywall schedule. The exact stages follow the approved compliance documents and applicable procedures; this guide explains the typical coordination points from planning through closeout.

The CEC’s 2025 Reference Residential Appendix RA3.5 defines the installation and verification protocol for 2025-code QII. It should control over any generalized sequence described here.

Phase 1: Pre-Inspection Planning

The QII process begins well before the ECC rater (formerly HERS rater) arrives on site. Planning starts during design and permitting, when the energy consultant identifies the modeled measures and documentation.

Energy model coordination. The energy consultant prepares the applicable compliance documents, which identify the insulation types, R-values, and installation methods for the building-envelope assemblies. Confirm that the current documents match the approved plans and are available to the insulation contractor and ECC rater.

Scheduling the inspection. Contact the ECC rater early to discuss the project timeline and reserve rough-in verification while the required details remain visible. Provide estimated insulation-completion dates and communicate schedule changes; actual availability and lead time vary.

Insulation contractor briefing. Before work starts, review the approved assembly details, material specifications, air-barrier alignment, fitting around penetrations, and documentation with the contractor. The material-specific QII best-practices guide can support the crew briefing but does not replace project documents or manufacturer instructions.

Phase 2: The Rough-In Inspection

At rough-in, the ECC rater examines the applicable insulation and air-barrier details while they remain accessible, before finishes conceal the work.

What the rater inspects. The scope is defined by the project documents and verification procedure and may include exterior walls, ceilings, floors over unconditioned spaces, kneewalls, rim areas, and other thermal-boundary assemblies. Typical questions include:

• Is the cavity completely filled with insulation?
• Does the insulation type and R-value match the CF-1R?
• Is the insulation aligned with and in contact with the designated air barrier as required by the approved thermal/air-boundary assembly and applicable details?
• Are there any gaps, voids, or compressions?
• Is insulation properly fitted around penetrations (pipes, wires, electrical boxes)?
• Are there any areas where insulation is missing entirely?

How long it takes. Duration depends on project size, complexity, access, documentation, and the number of assemblies. Confirm site-specific timing and safe-access needs with the rater instead of relying on a generic square-foot estimate.

Documentation. The ECC rater documents findings and completes the records required by the applicable registry and project. Documented deficiencies identify work that needs correction before the verification can be completed.

Phase 3: Corrections (If Needed)

Not every home passes QII on the first attempt, and that is okay — the correction process is designed to be efficient and straightforward.

Reviewing the correction report. Use the rater’s location notes and photographs, when provided, as the crew’s correction list. Share it promptly with the insulation contractor and keep each item traceable.

Making corrections. Scope and duration vary. Common items include gaps, compressed batts, missing insulation, air-barrier discontinuities, fitting around penetrations, and documentation mismatches. Address every listed item before requesting reinspection.

Requesting reinspection. Once corrections and supporting documentation are complete, notify the ECC rater and confirm the return window. Availability and reinspection scope are project-specific.

Phase 4: The Final Inspection

Later-stage verification, when required for the project, occurs after the relevant construction work and checks accessible items called for by the procedure.

What the rater checks. The ECC rater reviews the accessible items in the project scope, which may include attic coverage, floor insulation support, or trade disturbance. The exact checklist depends on the approved measures and applicable procedure.

The rater also checks for any new penetrations or modifications that may have been made since the rough-in inspection. If HVAC ducts were installed in the attic after insulation, the rater verifies that insulation was not displaced by the ductwork. If recessed lights or exhaust fans were installed in insulated ceilings, the rater confirms that insulation is properly fitted around these fixtures.

Completion of documentation. Once required verification is complete, the ECC rater completes the applicable registry and compliance documentation for project closeout.

Phase 5: Integration With Other ECC Field Verifications

QII may be one of several ECC field verifications identified in a project’s Title 24 compliance documents. Other measures can include duct leakage, refrigerant charge, fan efficacy, airflow, or envelope testing. Requirements vary by project.

Coordinate the full verification schedule with the ECC rating company so each measure is tested at the stage when its components are ready and accessible.

Tips for a Smooth QII Process

These practices can reduce avoidable inspection-day issues:

1. Schedule early and communicate often. Give the ECC rater advance notice and keep them updated on schedule changes.
2. Brief your insulation contractor. Make sure the crew knows this home will be QII inspected and what the standards are.
3. Walk the house before calling for inspection. Allow enough time for the superintendent or crew lead to review the accessible in-scope assemblies before the rater arrives.
4. Ensure access to all areas. Attic hatches, crawl space entries, and all rooms should be accessible.
5. Have the CF-1R on site. The rater will reference these documents during the inspection.
6. Address corrections immediately. The faster corrections are made, the sooner the re-inspection can happen and drywall can proceed.

Poppy Energy’s QII Process

Builders and project coordinators can contact Poppy Energy to map required ECC field verifications to the job schedule and reserve the appropriate QII inspection window.