Core Field Workflow

Find the actual leak path before smearing more sealant. Walk the joint, seam, access door, tap, cap, and temporary test closure in a consistent order.

A wide or moving gap is not automatically a “more mastic” problem. Confirm whether the joint needs to be re-fit, fastened, patched, or reinforced before sealing.

Let the approved sealant reach the required cure condition before pressurizing the section. Cure time depends on the product, thickness, temperature, humidity, and job conditions.

Isolate the exact section, secure every temporary opening, verify the duct is supported, and walk all joints before the test equipment is connected.

Record the tested section, date, test condition, result, leak locations, repairs, and retest status while the information is still visible.

Clarify who isolates the section, supplies the test rig, operates it, witnesses the test, performs repairs, and signs the result before the crew starts staging.

Stop before reaching into equipment, fans, dampers, belts, coils, or energized control compartments. The employer’s lockout/tagout procedure and authorized-person rules control the work.

Treat welding, torch cutting, grinding, and spark-producing work as a permit-and-area-control task. Site hot-work rules decide when it can proceed.

Plan the cut so the sheet and the scrap stay controlled. Deburr or protect exposed edges before the piece is carried, staged, or left in a work area.

Verify the unit opening, curb or adapter, airflow direction, access, and transition geometry before fabricating or forcing the duct connection.

Support the VAV from approved points, keep it level as required, and leave access to controls, actuator, filter, heater, coil, and panels.

Before fixing the VAV route, confirm the reheat-coil piping side, valve package, drain/vent needs, controls access, insulation space, and ceiling access.

Before blaming controls, verify the damper blades, shaft, linkage, travel, set screws, access, and required fail position are mechanically ready.

Confirm the exact sensor type, orientation, insertion depth, access, straight-run needs, and controls detail before cutting the duct.

Agree on elevations and install sequence before multiple trades fill the same zone. Use the signed coordination set and field conditions—not whoever arrives first.

Stop the affected work, document the exact clash, and compare both trades against the current coordinated set before anyone reroutes in the field.

Coordinate the opening, curb, flashing, membrane protection, temporary weather seal, and roofing warranty requirements before cutting or setting work on the roof.

Confirm the printed scale, sheet size, and whether the drawing was resized before taking any scaled dimension. Use written dimensions whenever available.

A symbol alone is not enough. Match it to the legend, tag, schedule, airflow direction, detail reference, and nearby notes before laying out the device.

Closeout is more than finished duct. The project may need labels, test records, access information, approved submittals, warranties, training support, photos, and as-built updates.

Select and install an access door that maintains the required seal, insulation, liner edge treatment, vapor barrier, and usable opening for the service task.

Install the specified nut, washer, jam nut, lock nut, or other locking method in the correct order and fully engage the threads without damaging the rod.

Provide the approved support detail so insulation and vapor barrier are not crushed, cut, or left discontinuous at rods, straps, saddles, and trapezes.

Outdoor duct needs an approved weather- and UV-resistant sealing system compatible with the metal, coating, insulation jacket, and expected movement.

Verify each punch item against the actual requirement, protect finished work, document the correction, and close only what was truly fixed.