Is Asbestos Dangerous?
The Health Risks You Need to Know
Asbestos is the single largest cause of work-related deaths in the UK. Around 5,000 people die from asbestos-related diseases every year — more than die on UK roads. The diseases it causes are serious, they develop silently over decades, and by the time symptoms appear, treatment options are limited. This guide explains what those diseases are, how they develop, and what the exposure symptoms look like.
Why Asbestos Fibres Cause Disease
Asbestos is dangerous because of what happens when its fibres become airborne. The mineral itself, sitting undisturbed in a garage roof or floor tile, does not immediately harm anyone. The problem begins when the material is cut, drilled, sanded, or broken — releasing microscopic fibres into the air that can be inhaled without any sensation of breathing something harmful.
Once inhaled, the fibres behave differently depending on their type and shape. Amphibole fibres — crocidolite (blue) and amosite (brown) — are straight and needle-like. They penetrate deep into the lung tissue and are extremely difficult for the body to expel. Chrysotile (white asbestos) fibres are curly and are cleared more readily, but they still carry significant risk at sufficient dose. The International Agency for Research on Cancer classifies all forms of asbestos as Group 1 carcinogens — meaning there is sufficient evidence that they cause cancer in humans.
The body's immune response to trapped fibres triggers chronic inflammation. Over years and decades, this inflammation causes scarring, cellular damage, and in some cases, malignant transformation. The long latency period — often 20 to 50 years between exposure and diagnosis — is what makes asbestos-related disease so difficult to detect early and so devastating when it finally presents.
In the UK, asbestos was used extensively in construction from the 1950s through to the late 1990s. Any building constructed before 2000 may contain asbestos-containing materials (ACMs). The HSE estimates that around 1.5 million commercial buildings in the UK still contain asbestos. That figure does not include the millions of residential properties — garages, sheds, extensions, and older homes — where asbestos cement, artex, floor tiles, and pipe lagging remain in place.
Asbestos Fibre Types and Relative Risk
| Fibre Type | Risk Level | Notes |
|---|---|---|
| Crocidolite (Blue) | Highest | Needle-like fibres penetrate deepest into lung tissue. Banned in UK 1985. |
| Amosite (Brown) | Very High | Straight, brittle fibres. Common in insulating board. Banned in UK 1985. |
| Chrysotile (White) | High | Curly fibres — still the most common type found in UK buildings. Banned 1999. |
Five Asbestos-Related Diseases — What They Are and How They Develop
Asbestos exposure does not cause a single disease. Depending on the type of fibre, the dose, and the individual's biology, it can lead to five distinct conditions — ranging from benign pleural changes to aggressive malignancies. Here is what each one involves.
Mesothelioma
Malignant cancer
Mesothelioma is a cancer of the mesothelium — the thin membrane lining the lungs, chest wall, and abdomen. In the UK, around 2,700 people receive a mesothelioma diagnosis every year, and the Health and Safety Executive attributes over 90% of cases directly to occupational or environmental asbestos exposure. There is no cure. Treatment is palliative. The latency period means that someone exposed in the 1970s or 1980s may only now be developing symptoms.
Prognosis: Median survival 12–18 months from diagnosis
Asbestosis
Progressive lung disease
Asbestosis develops when inhaled asbestos fibres cause progressive scarring (fibrosis) of the lung tissue. The lungs lose elasticity, breathing becomes increasingly laboured, and the condition worsens over time. It does not resolve. The degree of impairment correlates with the cumulative fibre dose — which is why even a single high-exposure event, such as disturbing a large area of deteriorating asbestos insulating board without protection, carries real risk.
Prognosis: Progressive; no reversal of fibrosis
Lung Cancer
Malignant cancer
Asbestos is a class 1 carcinogen for lung cancer under IARC classification. The risk is not confined to heavy industrial workers — it affects anyone exposed to respirable fibres over time. Critically, asbestos and cigarette smoke act synergistically: a smoker with significant asbestos exposure carries a lung cancer risk approximately 50–90 times higher than a non-smoker with no asbestos exposure, according to data published by the British Thoracic Society.
Prognosis: 5-year survival rate approximately 15–20%
Pleural Plaques
Benign pleural thickening
Pleural plaques are areas of fibrous thickening on the pleural membrane. They are the most common indicator of past asbestos exposure and are found in a significant proportion of people who worked in industries with routine asbestos contact. Plaques themselves are benign and do not cause symptoms, but their presence confirms that fibres reached the pleural space — and that the individual carries an elevated risk of the more serious conditions listed above.
Prognosis: Benign; marker of past exposure
Pleural Mesothelioma
Malignant cancer (pleural variant)
Pleural mesothelioma — the most common form — originates in the pleura surrounding the lungs rather than the lung tissue itself. It accounts for approximately 75% of all mesothelioma cases in the UK. Symptoms include persistent chest pain, breathlessness, and pleural effusion (fluid accumulation). By the time symptoms appear, the disease is typically at an advanced stage.
Prognosis: Median survival 12–21 months
Symptoms of Asbestos-Related Disease
The symptoms of asbestos-related disease do not appear immediately after exposure. They develop over years or decades as the damage accumulates. By the time symptoms become noticeable, the disease is typically at an advanced stage — which is why anyone with a history of asbestos exposure should discuss this with their GP, even in the absence of symptoms.
Persistent breathlessness
Worsens progressively; not relieved by rest
Chronic dry cough
Often mistaken for a respiratory infection
Chest tightness or pain
Can indicate pleural involvement
Unexplained weight loss
Common in mesothelioma and lung cancer
Finger clubbing
Associated with asbestosis and lung cancer
Pleural effusion
Fluid around the lungs — causes breathlessness
Fatigue
Reduced lung capacity leads to chronic tiredness
Recurrent chest infections
Scarred lung tissue is more susceptible
Important: These symptoms overlap with many common respiratory conditions. The key differentiator is a history of asbestos exposure — occupational, domestic, or para-occupational. Tell your GP about any known exposure, including the approximate date, duration, and likely fibre type. This information directly affects the diagnostic pathway your GP will follow.
Asbestos Exposure Is Not Just a Historical Problem
The peak of asbestos use in UK construction was the 1960s and 1970s, but the exposure risk has not ended. Around 1.3 million tradespeople — electricians, plumbers, carpenters, heating engineers, and builders — work in buildings that contain asbestos every day. The HSE estimates that tradespeople are the group most at risk of asbestos exposure in the UK today, not historical industrial workers.
Homeowners who carry out DIY work in properties built before 2000 face the same risk. Drilling into a ceiling containing artex, cutting through an asbestos cement garage roof, or removing old floor tiles without testing first — all of these activities can release fibres. The exposure may be brief, but the risk is real.
Para-occupational exposure — where fibres are carried home on work clothing — has caused mesothelioma in the family members of workers. Cases have been documented in the wives and children of men who worked with asbestos insulation board in the 1960s and 1970s. This exposure route is now recognised in UK compensation claims and legal proceedings.
Tradespeople
Electricians, plumbers, carpenters, and heating engineers working in pre-2000 buildings face daily exposure risk.
Homeowners
DIY work in older properties — drilling, cutting, sanding — can disturb ACMs without any visible warning.
Family Members
Para-occupational exposure via contaminated work clothing is a documented and legally recognised exposure route.
If You Suspect Asbestos — or Know You Have Been Exposed
Stop work immediately
If you disturb a material and suspect it may contain asbestos, stop work, leave the area, and do not return until the material has been tested. Do not attempt to clean up the debris — this will increase fibre dispersal.
Get the material tested
A UKAS-accredited laboratory can analyse a sample and confirm whether asbestos is present and what type. Pro Asbestos Removal provides testing as part of our survey service — results are typically returned within 3–5 working days.
Arrange professional removal
If asbestos is confirmed, arrange removal by an HSE-licensed contractor. Do not attempt to remove it yourself — this is a legal requirement for licensable materials and a serious health risk for all types.
Tell your GP about any exposure
If you have had significant exposure — even years ago — tell your GP. Provide as much detail as you can: when, where, for how long, and the likely fibre type. Your GP can arrange baseline lung function tests and refer you to a respiratory specialist if needed.
Keep records
Document the exposure event in writing — date, location, nature of the work, and likely material type. This record matters for any future compensation claim or medical assessment.
Common Questions About Asbestos Health Risks
Is there a safe level of asbestos exposure?
No regulatory body has established a safe threshold for asbestos exposure. The Control Limit set by the HSE (0.1 fibres per cm³ as an 8-hour time-weighted average) is a legal maximum, not a safe level. Any exposure carries some risk — the risk simply increases with dose and duration.
How long after exposure do symptoms appear?
The latency period for asbestos-related diseases ranges from 10 to 60 years. Mesothelioma typically takes 20–50 years to develop after initial exposure. This long latency is why the UK is still seeing peak mesothelioma rates despite asbestos being banned in 1999.
Can a single exposure cause mesothelioma?
Yes. A single high-intensity exposure — for example, disturbing a large area of deteriorating asbestos insulating board without PPE — can be sufficient to initiate the cellular changes that lead to mesothelioma. The risk from a single brief exposure is lower than from repeated exposure, but it is not zero.
What should I do if I think I have been exposed?
Tell your GP about the exposure, including when it occurred and the likely fibre type if known. Your GP can refer you for a chest X-ray and lung function tests. Keep a record of the exposure event — this matters for any future compensation claim. Do not disturb the material again.
Does asbestos in a building always pose a health risk?
Not necessarily. Asbestos-containing materials that are in good condition and are not disturbed do not release fibres into the air. The risk arises when the material is damaged, deteriorating, or subjected to drilling, cutting, or sanding. A management survey will assess the condition and risk rating of any ACMs present.
Are family members of workers also at risk?
Yes. Para-occupational exposure — where fibres are carried home on work clothing — is a documented cause of mesothelioma. Cases have been recorded in the wives and children of workers who brought asbestos dust home on their overalls. This exposure route is now recognised in UK compensation claims.
Related Guides & Services
What Is Asbestos?
Types of asbestos, where it is found in UK buildings, and how to identify suspect materials.
Read guideControl of Asbestos Regulations 2012
Your legal obligations as a homeowner, landlord, or duty holder under CAR 2012.
Read guideAsbestos Surveys Explained
Management, refurbishment, and demolition surveys — which one you need and when.
Read guideAsbestos Testing
UKAS-accredited laboratory analysis of suspect materials. Results in 3–5 working days.
Read guideCan I Remove Asbestos Myself?
The legal rules around DIY removal, what you can and cannot do, and the risks involved.
Read guideAsbestos Removal Services
HSE-licensed removal for garages, roofs, sheds, and commercial properties across the South East.
Read guideSuspect Asbestos in Your Property?
The safest first step is a professional survey. Our UKATA-certified team will assess the property, identify any ACMs, and give you a clear written report — including a risk rating and recommended action. Free quotation, same-week availability.