Spray painting generates a fine mist of paint particles and solvent vapours that are both flammable and harmful to health. Without adequate ventilation and extraction, explosive atmospheres can develop rapidly in enclosed areas. Spray painting must be carried out in purpose-built booths or controlled environments with appropriate safety measures. This talk covers the key safety requirements for spray painting operations on UK construction sites.
Key Hazards
Explosive atmosphere from solvent vapour accumulation in enclosed areas
Respiratory illness from inhaling atomised paint particles and solvents
Fire from spray mist igniting on hot surfaces or near electrical sparks
Skin sensitisation from prolonged contact with isocyanate-based paints
Control Measures
Carry out spray painting only in a properly ventilated spray booth or controlled outdoor area.
Ensure the booth extraction system is operating correctly before starting any spraying.
Use RPE with an air-supplied hood or full-face mask with organic vapour and particulate filters.
Wear chemical-resistant coveralls, gloves, and eye protection during all spraying operations.
Eliminate all ignition sources within the spray zone including electrical switches and static buildup.
Ensure all electrical equipment in the spray zone is rated for use in explosive atmospheres (ATEX).
Keep only the minimum quantity of paint and solvent needed for the current task in the work area.
Clean spray equipment and booth filters regularly to prevent buildup of flammable residues.
Brief operatives on the COSHH assessment for each paint product including sensitiser warnings.
Emergency / Rescue
If a fire starts in the spray booth, activate the fire suppression system if fitted. Evacuate the area immediately and close the booth door to contain the fire. Call 999. Do not re-enter. Use the nearest suitable extinguisher only if it is safe to do so.
Remember
Spray paint only in a ventilated booth or controlled area with the extraction running
Use air-supplied RPE or a full-face mask with organic vapour filters during spraying
Eliminate all ignition sources and ensure electrical equipment is ATEX rated in the spray zone
Wear chemical-resistant coveralls, gloves, and eye protection throughout the operation
Keep only the minimum paint and solvent quantity needed for the current task in the work area
Applicable Legislation: COSHH 2002 · DSEAR 2002 · ATEX Equipment Directive · Health and Safety at Work etc. Act 1974