What Is HAVS? A UK Employer's Guide to Hand Arm Vibration Syndrome

HAVS: What It Is and Why Employers Need to Act

HAVS stands for Hand Arm Vibration Syndrome. It's a group of conditions caused by regular exposure to vibrating hand tools — nerve damage, blood vessel damage, and musculoskeletal problems in the hands, wrists, and arms. Once the damage is done, it's permanent.

This isn't a guide to the medical detail of HAVS. If you employ people who use vibrating tools, what you need to know is: how to recognise the risk, what the law requires you to do, and what practical steps prevent your crew from developing a condition that can end their working life.

Who Is at Risk?

Any worker who regularly uses vibrating hand tools. In UK construction, that includes:

• Groundworkers using breakers, compactors, and vibrating pokers
• Bricklayers using disc cutters, angle grinders, and hammer drills
• Landscapers using strimmers, chainsaws, and hedge trimmers
• Road workers using pneumatic breakers and plate compactors
• Electricians and plumbers using hammer drills and chasing tools

The HSE estimates that millions of workers in the UK are regularly exposed to hand-arm vibration at work. Construction workers are among the highest-risk groups.

Risk factors that increase the likelihood of developing HAVS:

• Higher vibration magnitude — a pneumatic breaker at 18 m/s² is far more dangerous per minute of use than a strimmer at 5 m/s²
• Longer exposure — cumulative daily and lifetime exposure both matter
• Cold and damp conditions — cold reduces blood flow to the hands, making vibration damage more likely
• Tight grip — gripping tools harder than necessary increases vibration transmission

Recognising HAVS Symptoms

HAVS develops gradually. Workers often ignore early symptoms or attribute them to cold weather. The key signs, roughly in order of progression:

1. Tingling or numbness in the fingers — especially after using vibrating tools, often mistaken for "pins and needles"
2. Loss of feeling — difficulty picking up small objects, doing up buttons, or handling coins
3. White finger episodes — one or more fingers go white and numb, then become red and painful as blood returns. Triggered by cold or wet conditions.
4. Reduced grip strength — difficulty holding tools, opening jars, or turning taps
5. Permanent numbness — loss of sensation that doesn't recover between exposures

These symptoms are irreversible. There is no cure for HAVS — only prevention. This is why the legal framework focuses on exposure limits and early detection through health surveillance, not treatment.

What the Law Requires

The Control of Vibration at Work Regulations 2005 place specific duties on UK employers:

Risk assessment: Assess vibration exposure for all workers who use vibrating tools. See our HAVS Risk Assessment guide.

Exposure limits: Two thresholds apply (see EAV and ELV explained):

• EAV (2.5 m/s² A(8) / 100 points): Introduce controls and health surveillance
• ELV (5 m/s² A(8) / 400 points): Must not be exceeded

Controls: Reduce exposure as far as reasonably practicable. See HAVS Control Measures.

Health surveillance: Annual screening for workers exposed at or above the EAV. The tier system runs from self-assessment questionnaires (Tier 1-2) to clinical assessment by occupational health professionals (Tier 3-5).

Records: Keep exposure records, risk assessments, and health surveillance data. Health records must be kept for 40 years.

Information and training: Workers must understand the risks, how to recognise symptoms, and how to report them.

Practical Steps for Small Contractors

If you've never formally managed HAVS risk, start here:

1. List your vibrating tools with their vibration magnitudes — use the HAVS Trigger Time Chart to see how long each can be used safely
2. Calculate daily exposure for your most-exposed workers — use the free HAVS Exposure Calculator
3. Write a risk assessment — follow our step-by-step guide
4. Set up annual health surveillance — at minimum, a Tier 2 questionnaire for every worker who regularly uses vibrating tools. HSE provides the screening questions in their health surveillance guidance.
5. Keep daily records — use our HAVS Log Sheet Template to start, or set up ongoing tracking with HAVS·Log

What HAVS Is Not

HAVS is not carpal tunnel syndrome. Carpal tunnel is nerve compression in the wrist, often from repetitive motions. HAVS affects nerves, blood vessels, and joints across the hand and arm due to vibration. A worker can have both conditions, but they have different causes and different legal frameworks.

HAVS is not just "white finger." White finger (Raynaud's phenomenon) is one symptom of HAVS, but the syndrome also includes nerve damage (numbness, tingling) and musculoskeletal damage (pain, weakness). A worker can have HAVS without ever experiencing white finger episodes.

HAVS is not a new discovery. The condition has been recognised since the early 1900s. UK regulations specifically targeting vibration exposure have been in force since 2005. This is not emerging science — the risk is well understood and the legal duties are clear.

Sources

• The Control of Vibration at Work Regulations 2005 (SI 2005/1093)
• HSE — Hand-arm vibration
• HSE — Hand-arm vibration: Protect your workers