Managing Asbestos Risk in Construction: CDM Compliance Explained
Asbestos doesn’t announce itself. It hides inside walls, floor tiles, pipe lagging, and ceiling boards — waiting to be disturbed by a drill, a saw, or a sledgehammer. For anyone working on pre-2000 buildings, managing asbestos risk in construction isn’t optional. It’s a legal duty, and getting it wrong can mean prosecution, project shutdowns, and — far more seriously — workers developing fatal diseases decades later.
This post covers the regulations that apply, who is responsible for what, how to identify risks before work begins, and how to manage those risks safely on site.
Why Asbestos Remains a Serious Construction Hazard
Asbestos was used extensively in UK buildings right up until its full ban in 1999. Any structure built or refurbished before the year 2000 may contain asbestos-containing materials (ACMs). On a construction site, the danger isn’t from asbestos sitting undisturbed — it’s from trades cutting, drilling, stripping, or demolishing materials without knowing what’s in them.
When asbestos fibres become airborne, they can be inhaled deep into the lungs. The diseases they cause — mesothelioma, asbestosis, and asbestos-related lung cancer — have latency periods of 20 to 40 years. By the time symptoms appear, the damage has long been done.
Construction workers remain one of the highest-risk groups for asbestos exposure in the UK. Electricians, plumbers, joiners, and demolition crews routinely disturb ACMs without realising it. That’s exactly why the regulatory framework is so robust — and why compliance must never be treated as a box-ticking exercise.
The Regulations You Need to Know
Control of Asbestos Regulations
The Control of Asbestos Regulations is the primary legislation governing how asbestos must be managed, handled, and removed across the UK. It applies to all non-domestic premises and sets out duties for building owners, employers, and contractors.
Under these regulations, asbestos work is divided into three categories: licensed work, notifiable non-licensed work (NNLW), and non-licensed work. The category determines what controls, notifications, and health surveillance requirements apply. The most hazardous materials — sprayed coatings, lagging, and insulating board — require a licensed contractor and advance notification to the HSE.
The regulations also require that anyone who may disturb ACMs receives adequate information, instruction, and training. This applies not just to removal specialists but to any trade that might encounter asbestos during routine construction activity.
Construction (Design and Management) Regulations
The Construction (Design and Management) Regulations — commonly known as CDM — govern health and safety management across the entire lifecycle of a construction project. They place specific duties on clients, principal designers, principal contractors, and other contractors to plan, manage, and monitor health and safety.
Asbestos sits squarely within CDM’s scope. Pre-construction surveys must be carried out and their findings fed into the pre-construction phase. Risks must be designed out where possible. The health and safety file — a key CDM deliverable — must record the location and condition of any ACMs remaining in the structure after work is complete.
CDM and the Control of Asbestos Regulations work together. CDM provides the project management framework; the asbestos regulations provide the technical requirements. Both must be followed simultaneously.
Who Is Responsible for What: CDM Duty Holders and Asbestos
The Client
The client — whether a developer, building owner, or facilities manager — carries significant responsibility under CDM. Before any construction work begins, the client must ensure that a suitable asbestos survey has been carried out and that the findings are made available to the design and construction team.
Clients must also appoint competent principal designers and principal contractors, allocate sufficient time and budget for asbestos management, and ensure the project doesn’t proceed until asbestos risks have been properly assessed. Cutting corners at this stage creates liability that flows through the entire project.
The Principal Designer
The principal designer leads health and safety during the pre-construction phase. Their role in managing asbestos risk in construction is to identify ACMs during design, consider how the design can minimise disturbance of those materials, and coordinate the flow of asbestos information between all duty holders.
If survey results reveal significant ACMs, the principal designer should work with the client and principal contractor to determine whether those materials need to be removed before construction begins, or whether the design can be adapted to avoid disturbing them.
The Principal Contractor
The principal contractor takes over responsibility for health and safety during the construction phase. They must develop a construction phase plan that addresses asbestos risks, ensure all contractors on site have access to survey findings, and establish procedures for what happens if previously unidentified ACMs are discovered during work.
Stop-work protocols are essential. If a worker encounters a suspected ACM that wasn’t identified in the survey, work in that area must halt immediately. The material must be assessed by a competent person before any further disturbance occurs.
Contractors and Workers
Individual contractors must not begin work that could disturb ACMs until they have received relevant asbestos information and have the training, tools, and procedures in place to work safely. Workers must follow site rules, wear appropriate PPE, and report any suspected asbestos finds immediately.
Ignorance is not a defence. If a contractor disturbs asbestos because they didn’t read the survey findings, both the contractor and the principal contractor may face enforcement action from the HSE.
Identifying Asbestos Risks Before Work Starts
Choosing the Right Survey for the Job
Not all asbestos surveys are the same, and choosing the wrong type can leave dangerous gaps in your risk picture. For construction projects, the survey type depends on the nature of the work planned.
A management survey is appropriate for routine property management — it identifies ACMs in accessible areas that may be disturbed during normal occupancy and maintenance. However, for any refurbishment work, a more intrusive approach is required.
A refurbishment survey accesses areas that would normally remain undisturbed, including wall cavities, floor voids, and ceiling spaces. This is the appropriate survey type before any refurbishment or fit-out project begins.
For projects involving full or partial demolition, a demolition survey is mandatory. This is the most thorough survey type, designed to locate all ACMs throughout the entire structure before any demolition work begins.
HSG264 — the HSE’s guidance on asbestos surveys — makes clear that the survey must be appropriate for the planned work. Commissioning a management survey when a refurbishment or demolition survey is needed isn’t just inadequate — it’s a compliance failure.
What Happens When Asbestos Is Found
Finding asbestos in a survey isn’t a disaster — it’s valuable information. The survey report will assess each ACM’s condition, its likelihood of being disturbed, and its risk priority. From there, the project team has several options:
- Remove the material before construction work begins, using a licensed contractor where required
- Encapsulate or seal the material if it’s in good condition and won’t be disturbed
- Redesign the work to avoid the affected area entirely
- Implement controls to manage the risk if disturbance is unavoidable
The chosen approach must be documented in the construction phase plan and communicated to everyone on site who might be affected.
Risk Assessment: Getting It Right
Survey findings must feed directly into a formal risk assessment. This assessment should identify which ACMs pose a risk during the planned work, what controls are required, who is responsible for implementing those controls, and how compliance will be monitored on site.
Risk assessments must be specific to the work being carried out. A generic asbestos risk assessment is not sufficient — the assessment must reflect the actual materials present, their location, and the tasks that will be performed near them.
Managing Asbestos Risk in Construction: On-Site Controls
Licensed Removal Where Required
For high-risk ACMs — including sprayed asbestos coatings, asbestos insulating board, and pipe lagging — only a licensed contractor can carry out removal work. Licensed contractors must notify the HSE in advance, produce a written plan of work, and ensure workers undergo health surveillance.
When commissioning asbestos removal, always verify that the contractor holds a current HSE licence. You can check this on the HSE’s public register. Unlicensed contractors working on licensable materials are breaking the law — and so is the client who appointed them.
Safe Removal Procedures
Whether work is licensed or non-licensed, safe removal follows a consistent set of principles:
- Establish a controlled work area with appropriate signage and physical barriers
- Conduct baseline air monitoring before work begins
- Ensure all workers wear appropriate RPE (respiratory protective equipment) and disposable overalls
- Dampen materials before disturbance to suppress fibre release
- Use tools that minimise dust generation — hand tools rather than power tools where possible
- Double-bag all asbestos waste in clearly labelled, sealed bags
- Conduct clearance air testing before the work area is reopened
- Dispose of waste only at licensed hazardous waste facilities
Air monitoring during and after removal isn’t just good practice — for licensed work, it’s a legal requirement. Clearance certificates must be obtained before the controlled area is decommissioned.
Dealing With Unexpected Finds on Site
Even with a thorough survey, construction work sometimes uncovers ACMs that weren’t previously identified. Every construction phase plan should include a clear procedure for this scenario, communicated to all workers before they start on site — not after an incident has occurred.
The procedure should specify:
- Who workers must report the find to immediately
- What immediate actions must be taken — typically stopping work and isolating the area
- How the material will be assessed by a competent person
- What authorisation is needed before work can resume
Training, Records, and Ongoing Compliance
Worker Training Requirements
Anyone who might disturb ACMs during their work must receive asbestos awareness training. This applies to a wide range of trades: electricians, plumbers, plasterers, joiners, roofers, and general labourers working in pre-2000 buildings.
Asbestos awareness training covers what asbestos is, where it might be found, the health risks it poses, and what to do if suspected ACMs are encountered. It does not qualify workers to remove asbestos — but it does ensure they don’t inadvertently disturb it without recognising the risk.
Training must be refreshed regularly and records must be kept. The HSE can request evidence of training during an inspection, and the absence of records is treated as evidence that training hasn’t taken place.
Documentation and the Health and Safety File
Under CDM, the principal designer is responsible for compiling the health and safety file — a document that records information about the structure that future owners, occupiers, and contractors will need to manage it safely. Asbestos is a central element of this file.
The file must record the location and condition of any ACMs that remain in the building after construction work is complete. If materials were removed during the project, the file should confirm this, along with the disposal records and clearance certificates obtained.
This document doesn’t just satisfy a regulatory requirement — it protects future contractors from unknowingly disturbing asbestos in the same building years down the line.
Ongoing Monitoring During the Project
Managing asbestos risk in construction isn’t a one-time task completed before work starts. It requires active monitoring throughout the construction phase. The principal contractor should carry out regular site inspections to confirm that asbestos controls are being followed, that signage and barriers remain in place, and that any new finds are being reported and managed correctly.
Where licensed removal work is ongoing, air monitoring results should be reviewed regularly. Any exceedances or anomalies must be investigated and addressed without delay.
Regional Considerations: Getting the Right Survey Team
Construction projects are happening across the UK every day, and the need for competent asbestos surveying applies equally whether you’re working in a city centre or a rural location. Pre-2000 buildings are found everywhere, and the risks they present are consistent regardless of geography.
If you’re managing a project in the capital, an asbestos survey in London from a UKAS-accredited provider ensures your survey meets the standard required under HSG264. For projects in the north-west, an asbestos survey in Manchester from a specialist team gives you the same rigour and reliability. And for developments across the West Midlands, an asbestos survey in Birmingham from an experienced local team ensures nothing is missed before work begins.
Always confirm that your surveying provider holds UKAS accreditation and that individual surveyors hold the relevant P402 qualification. These aren’t optional extras — they’re the baseline standard for a legally compliant survey.
Common Mistakes That Lead to Enforcement Action
The HSE takes asbestos management in construction seriously, and enforcement action — including improvement notices, prohibition notices, and prosecution — is a real risk for those who fall short. The most common failures seen on construction sites include:
- No survey, or the wrong type of survey — using a management survey for refurbishment or demolition work
- Survey findings not shared with contractors — workers starting work without knowing what ACMs are present
- No stop-work procedure — sites with no plan for handling unexpected asbestos finds
- Unlicensed removal of licensable materials — either through ignorance or deliberate cost-cutting
- Inadequate training records — no evidence that workers received asbestos awareness training
- Incomplete health and safety file — ACM information not properly recorded for future reference
Each of these failures represents a genuine risk to worker health — not just a paperwork problem. The regulatory framework exists because the consequences of getting it wrong are measured in lives, not fines.
Frequently Asked Questions
Do I need an asbestos survey before starting any construction work?
If the building was constructed or refurbished before the year 2000, you must have a suitable asbestos survey carried out before work begins. The type of survey required depends on the nature of the work — a refurbishment survey for fit-out or alteration work, and a demolition survey for any full or partial demolition. HSG264 provides the HSE’s detailed guidance on survey requirements.
What is the difference between licensed and non-licensed asbestos work?
The Control of Asbestos Regulations categorises asbestos work based on the risk level of the materials and tasks involved. Licensed work — covering the most hazardous materials such as sprayed coatings, lagging, and asbestos insulating board — must be carried out by an HSE-licensed contractor with advance notification to the HSE. Non-licensed work involves lower-risk materials and tasks, though controls and training are still required. Notifiable non-licensed work (NNLW) sits between the two categories and carries its own specific requirements.
Who is responsible for asbestos management under CDM?
Responsibility is shared across CDM duty holders. The client must ensure a suitable survey is commissioned and findings are shared. The principal designer manages asbestos risk during the pre-construction phase. The principal contractor manages it during the construction phase and must ensure all contractors on site have the information they need to work safely. Individual contractors are also responsible for following the procedures and training requirements that apply to their work.
What should happen if asbestos is discovered unexpectedly during construction?
Work in the affected area must stop immediately. The area should be isolated and access restricted. A competent person must assess the material before any decision is made about how to proceed. The construction phase plan should include a written procedure for exactly this scenario, and all workers should be briefed on it before starting on site. Do not resume work in the area until the material has been assessed and appropriate controls are in place.
How often does asbestos awareness training need to be refreshed?
The Control of Asbestos Regulations require that training is adequate and up to date. While there is no single prescribed interval in the regulations, the HSE expects training to be refreshed regularly — typically annually for workers in higher-risk roles. Training records must be maintained and made available to the HSE on request. The absence of records is treated as evidence that training has not taken place.
Get Expert Support From Supernova Asbestos Surveys
Managing asbestos risk in construction requires the right surveys, the right expertise, and the right documentation — before, during, and after the project. Supernova Asbestos Surveys has completed over 50,000 surveys nationwide, working with developers, principal contractors, facilities managers, and building owners across the UK.
Whether you need a pre-construction survey, advice on CDM compliance, or support with asbestos removal, our UKAS-accredited team is ready to help. Call us on 020 4586 0680 or visit asbestos-surveys.org.uk to discuss your project requirements.