The elements that do the real work
The sealed boundary is the centerpiece: plastic barriers with managed openings that separate the work zone from the living home. Nearby supply and return vents deserve attention so ductwork does not become a dust distribution system; discuss with the crew how the home's air handling will be managed around the zone during heavy-dust phases.
Negative pressure, where appropriate, upgrades a good barrier: filtered air moved out of the zone keeps airflow leaning inward at every gap, so leaks pull clean air in rather than pushing dust out. It is standard practice in dust-sensitive work and worth requesting when the work zone borders bedrooms, offices, or anyone with respiratory sensitivities.
The route and the exit path are the neglected half. Debris and material traffic breach the boundary many times daily, so protected floors, a swept standard, and a planned debris path, ideally the shortest line to outside, matter as much as the barrier itself. Adjacent-room checks close the loop: a weekly wipe test on a dark surface two rooms away tells you honestly how the system is performing.
