Testing, Finish & Handoff

Use the sealing material approved for that joint, pressure class, duct type, exposure, and project specification; mastic and tape are not automatically interchangeable.

Correct the mechanical fit first; use reinforcing mesh and sealant only within the approved product limits and project detail.

Locate, mark, and classify the actual leak path before repairing it, then retest the same area after the approved repair cures.

Walk the complete test boundary before pressurizing and verify every cap, access door, damper position, temporary seal, support, and test connection is secure.

Use only the pressure, duration, allowable leakage, equipment range, and sequence stated in the approved project test plan.

Finish every field-cut liner edge with the approved edge treatment so fibers are secured and the airstream-facing surface remains intact.

Maintain one continuous vapor barrier by sealing seams, overlaps, hanger penetrations, access doors, and repairs with the approved compatible system.

Use the specified exposed-service insulation and finish system, keeping seams straight, damage repaired, labels visible, and the final surface suitable for the occupied space.

Label the actual final system, service, and airflow direction in the required locations using durable, readable identifiers that match the as-built documents.

Before startup, verify the air path is clean and complete, temporary caps are handled correctly, dampers and access doors are ready, filters are protected, and construction conditions will not contaminate the system.

Document the exact condition, location, drawing or equipment reference, responsible party, temporary status, and required verification before closing the item.

Lay out the downstream duct, branches, dampers, flex, and diffusers so the approved airflow distribution, access, ceiling coordination, and service clearances remain workable.