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Run: Residential Insulation Pre-Drywall Inspection

Use this pre-drywall inspection to verify insulation type, R-value, coverage, and air sealing before drywall hides defects. It helps catch missing batts, gap...

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Inspection Setup and Scope

Verify the inspected dwelling, floor, unit, or zone is clearly identified and all areas to be checked are safely accessible.
Confirm insulation and air sealing are being inspected before drywall installation closes the cavities.
Verify the applicable plans, insulation schedule, or approved specification is available for comparison.
Record any conditions that may affect inspection visibility or access, such as lighting, moisture, or incomplete framing.

Insulation Type and R-Value

Confirm the installed insulation type matches the approved design or specification for each assembly.
Measure installed insulation depth where applicable and compare to the required thickness for the assembly.
Verify the installed insulation R-value meets the approved design or local code requirement for the assembly.
Confirm product labels, packaging, or documentation support the installed insulation type and R-value.
Check that batts, blankets, or other insulation are not compressed, missing, or leaving voids that reduce effective R-value.

Coverage, Continuity, and Fit

Check that designated wall cavities are fully filled with no missing sections, gaps, or exposed framing where insulation is required.
Verify ceiling or attic insulation is continuous across the required area, including corners and transitions, without significant gaps.
Confirm floor insulation is secured, supported, and not sagging, falling, or detached from framing members.
Verify insulation coverage at rim joists, band joists, and other transition areas where thermal bridging is common.
Check around pipes, wiring, ducts, blocking, and other obstructions for uninsulated voids or missed areas.

Air Sealing and Thermal Envelope Details

Inspect for sealed gaps at framing penetrations, plate lines, and other openings that connect conditioned and unconditioned spaces.
Verify rough openings around windows and doors are sealed to reduce air leakage before drywall is installed.
Check attic hatches, mechanical chases, plumbing penetrations, electrical penetrations, and similar openings for proper air sealing.
Confirm the air barrier is continuous at transitions between walls, ceilings, floors, and other envelope assemblies.
Record the measured air leakage result when blower door testing has been completed. Use the project requirement or local code threshold for acceptance.

Installation Quality and Deficiencies

Record any missing insulation, gaps, compression, damaged material, or incomplete air sealing observed during the inspection.
Document the corrective action required for each deficiency, including responsible party and target completion date if applicable.
Indicate whether a follow-up inspection is required before drywall installation can proceed.

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