Dust Control When Two Rooms Are Open at Once

A zipper door on a plastic barrier does one job: it holds a pressure difference so dust stays on the work side of the doorway. The advice kept at kitchen and bath riverside madame and me on kitchen and bath remodeling in Riverside, CA, starts there, because two rooms opened at once produce more dust than one, and it travels through the house if nothing stops it. Containment is set up before demolition, not after the first complaint.

Sealing each room separately

Each room gets its own plastic barrier with a zipper door, taped to the ceiling and floor. Heating and cooling vents inside the work zones are covered, and the return air is blocked so dust is not pulled through the ductwork. A fan in a window pulling air outward keeps the work area at slightly negative pressure, which means air leaks in through gaps instead of out into the house.

Where the dust comes from

Demolition makes the coarse dust, drywall sanding makes the fine dust, and tile cutting makes the silica dust. Cement board and backer board cut with a saw raise dust that settles everywhere. A wet saw outdoors, a vacuum attached to a grinder and a damp cloth on every ledge keep most of it contained. Sanding joint compound is done once, with a vacuum sander, before primer goes on.

Why the two rooms need different handling

A kitchen produces more demolition debris, with old cabinets, countertop and flooring. A bathroom produces finer dust, from cutting porcelain tile and sanding patched walls. If both rooms are open at the same time, the finish work in one cannot start while the other is still being sanded. A crew sequences the dusty work in both rooms first, then cleans, then moves to the clean finish work in both.

Riverside summer and the wind

Dry summer air in the Inland Empire carries its own dust, and Santa Ana winds in the fall push fine grit through any gap. Windows stay shut on windy days, and doors are not left propped open for material deliveries. Dust from outside lands on wet paint and uncured caulk, so finish coats are applied on calm mornings, when the air below Mount Rubidoux is still.

Cleanup that counts

A HEPA vacuum on every surface at the end of each day is faster than a broom and moves less dust into the air. Before the plastic barrier comes down, the surfaces inside the room are wiped and vacuumed once more, because pulling the barrier shakes loose everything that settled on it.

Protecting the rest of the house

Floors along the path from the door to the work zone are covered with rosin paper or adhesive floor film. A walk-off mat at the entrance catches grit before it spreads. A house with a finished hallway between two open rooms needs the most attention, because everything that leaves one room passes through that hall on its way to the dumpster.