MDF and Chipboard Dust

MDF (medium density fibreboard) and chipboard generate large volumes of fine dust when cut or machined.
MDF dust contains formaldehyde resin binders which are classified as carcinogenic to humans.
Wood dust from MDF and chipboard has a workplace exposure limit of 3 mg/m³ (inhalable dust).
The extremely fine particle size of MDF dust means it penetrates deep into the lungs.
Formaldehyde released during cutting causes irritation to the eyes, nose, and throat.
The COSHH Regulations 2002 require dust control and health surveillance for exposed workers.
Cutting, routing, sanding, and drilling MDF are the highest dust-generating activities on site.
MDF dust is also explosive when suspended in air at sufficient concentrations in enclosed spaces.
Hardboard and other engineered wood products containing resin binders carry similar hazards.
On-tool extraction connected to an M-class or H-class vacuum is the primary control measure.

Prevent cancer	Wood dust is a proven carcinogen and formaldehyde in MDF adds further cancer risk with long-term exposure.
Legal compliance	COSHH 2002 requires employers to assess and control exposure to MDF dust and provide health surveillance.
Respiratory protection	Fine MDF particles cause asthma, chronic bronchitis, and irreversible lung damage without proper controls.

Do

Don't

Use on-tool dust extraction connected to an M-class vacuum for all MDF cutting
Wear RPE with a minimum P3 filter when cutting, routing, or sanding MDF
Cut MDF outdoors or in well-ventilated areas whenever work allows
Enrol workers regularly cutting MDF in the health surveillance programme
Clean up MDF dust using a vacuum — never dry sweep or use compressed air
Check extraction equipment is working correctly before starting each cutting task
Select pre-cut or pre-machined MDF panels where practical to reduce on-site cutting
Ensure adequate general ventilation in enclosed spaces where MDF work takes place
Store cut MDF sheets carefully to prevent edges generating dust when disturbed
Report any persistent cough, wheeze, or eye irritation to your supervisor promptly

DON'T cut MDF without on-tool extraction — it generates extremely fine carcinogenic dust
DON'T dry sweep MDF dust as this creates hazardous airborne concentrations
DON'T blow MDF dust off surfaces or clothing using compressed air
DON'T work in enclosed rooms cutting MDF without mechanical ventilation running
DON'T ignore symptoms such as persistent cough, runny nose, or watering eyes
DON'T skip RPE when doing quick cuts — even short exposures contribute to harm
DON'T assume standard workshop dust extraction is sufficient for MDF work
DON'T allow other workers to remain in the area during uncontrolled MDF cutting
DON'T use a domestic vacuum to clean MDF dust — it requires M-class filtration
DON'T dispose of MDF offcuts by burning — this releases toxic formaldehyde fumes

See also: Wood Dust Exposure | On-Tool Extraction Systems

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