What Asbestos Information Should Contractors Receive Before Work Starts?

Before contractors drill, cut, remove, repair or open up parts of a building, they need reliable information about any known or presumed asbestos-containing materials (ACMs) in the areas where they will work. For London dutyholders, landlords, facilities teams and property managers, handing over the right asbestos information is a practical part of preventing accidental disturbance.

HSE guidance says workers and contractors should be told about the asbestos management arrangements before they start work on the fabric of a building. For planned work, this information should be provided as early as possible — for example when asking contractors to quote — so the work can be scoped and controlled properly.

What asbestos information should contractors receive?

The exact information depends on the building and the work, but a useful pre-work handover will normally include the asbestos register, relevant survey information, known limitations and the management controls that apply to the job. Where ongoing occupation and routine maintenance are the main concern, see our London asbestos management survey service.

Why the asbestos register alone may not be enough

An asbestos register is a live record of known and presumed ACMs, but it is only as useful as its scope and currency. Contractors also need to understand where the original survey did not inspect, what work is planned and whether the task will disturb concealed parts of the building.

HSE says the register should contain current information on the location and condition of known and presumed ACMs and should be updated when risk changes, materials deteriorate, asbestos is repaired or removed, or new areas are surveyed.

For more detail, see our asbestos register vs management plan guide.

When should information be given to contractors?

For planned work, asbestos information should be shared early enough to affect how the job is priced, planned and carried out. HSE specifically notes that this may be at the quotation stage.

Leaving the asbestos register until contractors arrive on site can create avoidable problems. The survey may reveal that the proposed method or access route needs to change, that a particular area was never inspected, or that a refurbishment asbestos survey is required before intrusive work begins.

Which contractors commonly need asbestos information?

• Electricians and alarm installers
• Plumbers, gas engineers and heating contractors
• Roofers and external maintenance teams
• Builders, joiners, plasterers and decorators
• Shop-fitters and office fit-out contractors
• HVAC and ventilation engineers
• Telecoms and data installers
• Maintenance engineers and repair contractors
• Demolition and refurbishment contractors

These trades can all disturb walls, ceilings, panels, pipework, service voids, plant areas, roof materials or other building fabric where asbestos may be present.

What if the work area was not surveyed?

Areas that were not inspected should not simply be treated as asbestos-free. HSE guidance says areas outside the survey scope or recorded as inaccessible should be clearly identified and, where appropriate, presumed to contain asbestos until suitable evidence is available.

If planned work will enter one of those areas, further investigation may be needed before the contractor starts. Depending on the task, that could mean targeted sampling or a suitably scoped refurbishment survey.

Our management survey vs refurbishment and demolition survey guide explains when more intrusive surveying may be required.

Should contractors rely on an old survey?

An older survey is not automatically unusable, but it should not be accepted without checking whether it still reflects the building and the proposed work. The report may pre-date later alterations, may contain inaccessible areas or may have been commissioned for a different purpose.

HSE describes the asbestos register as a live document and says it should be kept up to date when the condition or risk associated with ACMs changes. The management plan should also be reviewed at least every 12 months or sooner when necessary.

See our guide on how long an asbestos survey remains useful.

What should happen before intrusive maintenance?

Before work begins, compare the contractor’s method and work area with the asbestos information available. Check what will be drilled, cut, removed, opened or otherwise disturbed.

• Confirm the exact work area and access route
• Check the latest asbestos register and relevant survey report
• Review photographs, plans and sample results
• Identify any survey limitations or inaccessible areas
• Decide whether further sampling or intrusive surveying is required
• Provide the contractor with the relevant asbestos information
• Confirm safe-working and emergency arrangements
• Record any new findings, repairs or removals after the work

Planned maintenance guides by work type

Different maintenance activities disturb different parts of a building. Use the relevant guide when planning the work:

• HVAC, boiler, heating and ventilation replacement
• Drilling, cabling, CCTV, alarms and data installation
• Lift or elevator modernisation and replacement
• Roof replacement
• Window replacement

Permit-to-work and site controls

For some premises, a permit-to-work system can help prevent maintenance teams from starting intrusive work before asbestos information has been checked. HSE identifies permits-to-work and incident procedures as examples of arrangements that can form part of an asbestos management plan.

The right system depends on the building and the level of risk, but the principle is straightforward: intrusive work should not begin until the responsible person has confirmed that the asbestos information is suitable for the task.

What if a contractor finds a suspect material?

If an unexpected suspect material is uncovered, the work should not simply continue. The area should be left undisturbed while the situation is assessed. Further sampling, survey work or specialist advice may be required before the job resumes.

If asbestos is confirmed, the next action depends on the material, its condition and the work required. Some asbestos work requires an HSE-licensed contractor, while some lower-risk tasks may be non-licensed when carried out by appropriately trained and competent people using the correct controls.

See our guide on what to do after asbestos is found.

Contractor asbestos handover checklist

• Share asbestos information before the work is priced or scheduled where possible.
• Provide only information relevant to the actual work area, but do not omit limitations.
• Make sure the contractor understands any inaccessible or presumed-asbestos areas.
• Check whether the planned method will disturb materials not covered by the existing survey.
• Use a permit-to-work or equivalent control where appropriate.
• Explain what to do if unexpected suspect material is uncovered.
• Update the asbestos register after relevant repair, removal or new findings.

Authoritative HSE guidance

HSE’s duty-to-manage guidance on providing asbestos information explains what should be shared with workers and contractors before work begins. HSE also explains how to maintain an asbestos register and assess risk, including the need to keep condition information current.

For planned building, repair or maintenance work, HSE advises checking whether the part of the building likely to be disturbed contains asbestos and arranging further survey or sampling where records are incomplete or uncertain.

This article provides general information rather than legal advice. Responsibilities depend on the building, contracts or tenancy arrangements, who controls maintenance and repair, and the exact work proposed.

Need asbestos information before maintenance work in London?

If planned maintenance, installation or refurbishment will disturb building materials and your existing asbestos information is incomplete, send us the property details and proposed work. We can review the enquiry and confirm an appropriate survey scope and quotation.