Dry sweeping often lifts fine particles back into the breathing zone, turning settled dust into airborne PM10, PM2.5 and smaller. HSE guidance warns against dry sweeping for silica and other hazardous dusts because it increases exposure and spreads contamination.

Why resuspension happens

Brushes shear dust into the air, especially on smooth floors where bristles flick rather than collect. Air turbulence from fast passes creates a trailing cloud that lingers long after the operator moves on. The result is poorer visibility, higher exposure, and more cleaning later.

What to do instead

• Use industrial extraction with proper floor tools and high‑efficiency filtration; bag waste at the point of collection.
• For masonry work, apply water suppression at source and remove slurry with extractors rather than mops.
• If sweeping is unavoidable, use a dampening compound and slow, controlled strokes, followed by extractor‑based housekeeping.
• Set short, frequent cleans during dusty activities rather than one big end‑of‑shift sweep.
• Target edges and joints with crevice tools to stop tracked dust.

Air control matters

During grinding or strip‑out, place air scrubbers to pull dust away from walkways and out of the breathing zone. Choose the right filter class and focus on airflow under load. This prevents the haze that dry sweeping pushes around.

Method comparison in practice

In sweepers vs vacuums, extraction wins for fine dust: fewer airborne peaks, cleaner edges, and quicker handovers. You also reduce the risk of exceeding WELs for respirable crystalline silica, currently 0.1 mg/m³ in the UK.

Replace brooms and compressed air with planned extraction and air cleaning, and the site stays clearer with less repeat work.