Dust Everywhere After Building Work

What's happening?

Construction dust is not household dust. Cutting, chasing, sanding and drilling produce very fine particles (including respirable crystalline silica from concrete, brick, mortar, screed and some plasters) that stay airborne for hours, travel far beyond the room being worked in, and settle into fabric, filters and every horizontal surface. It behaves differently from ordinary dust in two ways that matter for cleaning: it is abrasive, so dry-wiping it across a worktop, a bath or a new window scratches the surface, and it is fine enough to pass straight through a domestic vacuum bag and back into the room. An after-builders clean is therefore a specific method (vacuum with proper filtration first, wet wipe second, repeat) not a hard version of a normal clean.

What usually causes it?

• Cutting, chasing and drilling masonry, concrete, screed or plasterboard without on-tool extraction
• Sanding plaster, filler and paintwork, generating a fine dust that travels through the house
• No dust barriers on doorways, so dust migrates into rooms nobody worked in
• Dust drawn into the heating and ventilation system, extractor fans and radiator fins
• Fine dust settling into carpets, curtains, upholstery, bedding and inside wardrobes
• Domestic vacuum without adequate filtration recirculating the fine fraction back into the air
• Dry sweeping and dry dusting, which put settled dust back into the air and scratch surfaces

Is it dangerous?

Yes, more than people expect. Respirable crystalline silica in dust from concrete, brick, mortar and some plasters is a recognised cause of serious, irreversible lung disease, and HSE treats construction dust as a hazardous substance to be controlled rather than tolerated. In a home the exposure is much lower than on site, but repeated dry sweeping and dry dusting is exactly the activity that raises it. It matters more where there are children, or anyone with asthma or another lung condition. It is also abrasive: dry-wiping it scratches worktops, baths, shower trays and new glass permanently.

Can I fix it myself?

Yes, in the right order. Ventilate, then vacuum before you wipe anything: a vacuum with genuine HEPA-grade filtration, working top down, on hard surfaces, soft furnishings and inside cupboards. Only then wet wipe, changing the water often and using plenty of it so grit floats off rather than being dragged. Expect to repeat over several days as settled dust releases. Do not dry sweep, dry dust or use a leaf blower indoors, do not dry-wipe worktops or new glass, and do not run the heating on full before the ducts and fans have been cleaned.

When should you call a cleaner?

Call a cleaner for a whole-house after-builders clean, especially after any work involving masonry cutting, plastering or floor screed, and specifically if anyone in the household has asthma or another respiratory condition. Professional after-builders cleaning uses vacuum filtration a domestic machine does not have and works to a repeat schedule as the dust keeps settling. Time it after the last dusty trade and the last decorating coat, so it is not paid for twice.

What will the cleaner actually do?

• Vacuum top down with HEPA-grade filtration before any wiping, so fine dust is captured rather than moved
• Clean soft furnishings, curtains, carpets, mattresses and the insides of wardrobes and cupboards where dust has settled
• Wet clean hard surfaces with plenty of water so abrasive grit floats off rather than scratching
• Clean extractor fans, radiator fins, light fittings, tops of doors, skirtings and window reveals
• Clean sanitaryware, worktops and new glass with a method that does not drag grit across the surface
• Return or repeat as remaining airborne dust settles, rather than treating it as a single visit

Who fixes this

• After builders clean

Questions people ask

Sources & References

1. HSE: Construction dust
2. HSE: Cleaning industry
3. NHS: Asthma