Do I Need a Noise Level Assessment?
Quick Answer
Yes — if daily exposure is likely above 80 dB(A)
Based on: Control of Noise at Work Regulations 2005. Most power tools exceed 80 dB(A). Hearing protection mandatory at 85 dB(A).
The Legal Limits
- Lower exposure action value: 80 dB(A) daily average — assess risk, provide hearing protection on request
- Upper exposure action value: 85 dB(A) daily average — hearing protection mandatory, hearing protection zones required
- Exposure limit value: 87 dB(A) daily average (with hearing protection) — must not be exceeded
- Peak sound pressure: 135 dB(C) lower / 137 dB(C) upper action values
Typical Noise Levels on Site
- Hand tools (hammering): 85–100 dB(A)
- Circular saw: 95–105 dB(A)
- Angle grinder: 95–110 dB(A)
- Concrete breaker: 100–115 dB(A)
- Nail gun: 95–105 dB(A)
- SDS drill: 90–100 dB(A)
- Chop saw: 100–110 dB(A)
- Normal conversation: 60–65 dB(A)
What Must You Do?
- Assess noise exposure levels for your workers
- Eliminate or reduce noise at source where possible
- Provide hearing protection (above 80 dB(A) on request, mandatory above 85 dB(A))
- Designate hearing protection zones
- Health surveillance (audiometry) for regularly exposed workers
- Inform and train workers about risks
Reducing Noise
- Use low-noise equipment where available
- Maintain tools properly (worn bearings increase noise)
- Use damping materials or enclosures
- Limit exposure time — rotate tasks
Last updated: April 2026. This is general guidance under the Control of Noise at Work Regulations 2005. Noise assessments should be carried out by a competent person. Refer to HSE guidance L108 for detailed requirements.