Asbestos-containing materials in UK buildings: a reference guide

Older UK buildings can contain asbestos in many products. This guide explains common locations and material risks, using HSE guidance for Great Britain; Northern Ireland has separate regulations. Treat suspect materials as asbestos unless there is sufficient evidence otherwise, and establish what is present before work that could disturb it.

Treat this page as a reference. The detail per material is more depth than most readers need in one sitting; the point is that when you're trying to identify what you've found in a building, you can come here and read the relevant section.

A reminder before going further: visual identification can raise suspicion, but only laboratory analysis at a UKAS-accredited lab can confirm asbestos. Everything below is about probability, not certainty.

Where to look first: an overview

Common locations described by HSE include the following. This is not an invitation to open up or disturb suspect materials yourself:

Roof spaces — pipe lagging, water tanks, loose-fill insulation, AIB around tanks
Boiler rooms and plant rooms — lagging, gaskets, panels around the boiler, flue
Ceilings — textured coatings (Artex), AIB ceiling tiles
Walls — AIB partitions, behind fuses and fire surrounds, in service ducts
Floors — vinyl and thermoplastic tiles, mastic adhesives
Roofs (external) — asbestos cement sheets on outbuildings, garages, soffits, gutters
Service routes — pipes, ducts, risers, behind panels

The Health and Safety Executive publishes diagrams showing typical asbestos locations in domestic and commercial buildings, which is the visual reference most surveyors and trainers use.

Pipe lagging and thermal insulation

Asbestos was widely used to insulate pipes, boilers, calorifiers, and hot-water cylinders, particularly in commercial, industrial, and public buildings. The material was usually applied wet to a hessian or scrim wrap, then shaped around the pipework and painted.

Historic use: insulation can remain on older pipework and plant; installation date alone cannot identify it
Typical locations: Heating and steam pipes in boiler rooms, plant rooms, basements; around boilers and calorifiers; in service risers; on the underside of suspended ceilings; sometimes in residential airing cupboards
Visual signal: A thick, plaster-like coating on pipes, often wrapped in cloth or canvas, frequently painted over so colour varies from white to grey to coloured. The interior, exposed where the lagging is damaged, looks fibrous and crumbly
Friability: High. Lagging is one of the most readily fibre-releasing asbestos materials
Risk classification: Most work on lagging is licensed asbestos work and must be done by an HSE-licensed contractor

Lagging can readily release respirable fibres when damaged or disturbed. Harmful fibres need not be visible; keep away from damaged material and arrange appropriate assessment.

Do not touch, probe or break suspect lagging. Stop work, keep others away and arrange competent assessment; work that disturbs high-risk lagging generally requires a licensed contractor, while surveying is a separate competence issue.

Loose-fill insulation

Loose-fill asbestos was used to insulate lofts, fill cavity walls, pack around cables, and provide sound insulation between floors. Unlike most other ACMs, it's essentially pure asbestos fibre — usually amosite or a mix of amphibole types — blown or poured into the cavity.

Historic use: loose insulation may remain in older buildings or concealed spaces
Typical locations: Lofts of older domestic and commercial properties; cavity walls in some mid-century social housing; sound packing between floors
Visual signal: A loose, fluffy, candyfloss-like material — usually blue-grey or off-white, sometimes with a slight oily look. It moves easily; a draught from opening a loft hatch can disturb it
Friability: Highest of any ACM category — the fibres are essentially loose
Risk classification: Licensed asbestos work without exception

If you lift a loft hatch and see a grey, fluffy material that doesn't look like modern mineral wool, stop. Don't enter the loft. Don't move anything. The fibre release potential of loose-fill is the highest in the asbestos catalogue, and even brief disturbance can produce significant airborne concentrations.

Sprayed coatings

Limpet spray and other sprayed asbestos coatings were applied to structural steel, the underside of concrete floors, and ceilings in commercial buildings from the 1940s to the late 1970s. The primary purpose was fire protection of steel beams and columns; thermal insulation and acoustic damping were secondary uses.

Historic use: sprayed insulation and fire protection may remain on older structural elements
Typical locations: Underside of steel-framed commercial buildings, including the structural members above suspended ceilings; underside of concrete floors; sometimes on the inside of external walls and the underside of roofs
Visual signal: A textured, fibrous, popcorn-like surface — clearly not a smooth paint or plaster finish. Colour ranges from grey to white to off-white, sometimes painted over
Friability: Very high. Easily disturbed; major fibre release potential
Risk classification: Licensed asbestos work

Sprayed coatings are particularly problematic because they tend to age badly. The binder degrades; the fibre becomes loose; small impacts release visible quantities of dust. Buildings of the relevant era — particularly 1950s to 70s commercial structures — may have sprayed coatings hidden in ceiling voids, requiring careful refurbishment or demolition surveys before any work.

Asbestos insulating board (AIB)

AIB was used for fire protection, insulation and general building panels. HSE’s historical guide describes usually 15–25% amosite or an amosite/chrysotile mixture; some older and marine boards contained up to 40% asbestos.

Historic use: HSG264 records amosite board manufacture until 1980; older stock and retained panels mean a building date does not establish contents
Typical locations: Ceiling tiles in suspended ceiling grids; wall panels and partition boards; soffit panels; service riser linings; behind fire surrounds and around fire doors; behind electrical fuse boxes and switchgear; lining of plant rooms; around boilers and heating equipment; in airing cupboards; as fascia and soffit boards on building exteriors; lift shaft linings
Visual signal: grey or off-white board that may resemble asbestos-free products. Do not touch, bend or break it to assess texture.
Friability: Moderate. Fibres release more easily than cement but less than lagging or sprayed coatings
Work category: most AIB work requires a licence, but certain minor tasks can be non-licensed or NNLW only where all applicable conditions are met. Duration alone is not an exemption.

AIB is the material that most often catches inexperienced workers out. It looks like other lightweight building boards, it can be cut with hand tools, and it crops up in places people don't expect — around fuse boxes, behind fires, inside fire-door linings. A drill bit through an unmarked panel in a 1970s office can release a meaningful fibre dose if the panel turns out to be AIB.

Asbestos cement: roof sheets and garage roofs

Asbestos cement was widely used for roof and wall sheets. Chrysotile is common, with other asbestos types used in some older products. A generic percentage or grey appearance cannot establish the contents of a particular sheet.

Historic use: HSG264 records chrysotile in asbestos cement until November 1999 in Great Britain
Typical locations: Corrugated roof sheets on garages, sheds, outbuildings, agricultural buildings, industrial buildings; flat sheets used for weatherboarding and panelling; slate-style cement tiles on residential roofs
Visual signal: Grey or weathered grey-green sheets with the characteristic wavy corrugated profile or flat panel form. Often painted; surface can weather to a mossy or stained appearance over decades
Fibre release: generally lower when sound and undisturbed, but abrasion, cutting and deterioration can release fibres
Work category: many carefully controlled cement tasks are non-licensed; significant break-up or damage can make work NNLW. Apply the full assessment, not a simple size rule.

Sound cement products unlikely to be disturbed can often be managed in place. Drilling, cutting, breaking, cleaning and removal need the controls appropriate to the task. Cement roofs also present serious fragile-roof and fall risks.

Asbestos cement: gutters, downpipes, soffits

The same asbestos cement material was used in many other building products beyond roof sheets. The composition, friability, and management approach are similar to cement roof sheets — but the locations are different and the working environment when doing maintenance is often different too.

Historic use: cement rainwater goods and panels may remain on older buildings
Typical locations: Rainwater goods: gutters, hoppers, downpipes; soffit boards, eaves, and fascia panels; cladding sheets on building exteriors; garden products: planters, fence posts, panels
Visual signal: Grey or weathered grey-green, sometimes painted. Rainwater goods often have a distinct shape that distinguishes them from modern uPVC equivalents (thicker walls, less consistent finish, sometimes joined with cement rather than plastic clips)
Friability: Low in good condition; higher if weathered and crumbling
Risk classification: Mostly non-licensed work; specific care for cutting and disposal

Asbestos cement: water tanks, flues, soil pipes

Asbestos cement water tanks, flues and soil pipes

Asbestos cement was also used for products that handle water or combustion gases — applications where its corrosion and heat resistance made it well-suited.

Historic use: cement tanks, flues and pipes can remain in older properties and equipment
Typical locations: Cold water storage tanks in lofts; flue pipes from gas and solid-fuel appliances; soil pipes (less common, but used in some 1950s/60s installations); cisterns and pipes in commercial plumbing
Visual signal: Grey-cement appearance. Water tanks are often rectangular or square with a heavy, cement-like wall thickness; flues are circular section
Friability: Low in good condition
Risk classification: Mostly non-licensed work for replacement; flue removal requires care because of the potential for breakage

Asbestos floor tiles and mastic adhesive

Asbestos floor tile and bitumen adhesive

Floor tiles, backing and mastic can each contain asbestos. HSG264 distinguishes thermoplastic tiles containing up to 25% asbestos from PVC vinyl tiles normally containing about 7% chrysotile; these historical figures do not identify an individual floor.

Historic use: older flooring and adhesives may remain beneath later coverings; assess each affected layer
Typical locations: Vinyl and thermoplastic floor tiles in kitchens, hallways, bathrooms, corridors, commercial floors
Visual signal: tiles of several sizes, colours and patterns can contain asbestos. A nine-inch dimension is not a reliable identification test.
Fibre release: generally lower in sound bonded tiles; abrasion, damaged backing and sanding of residue can release fibres
Work category: assess the task and condition. HSE A23 treats removal of asbestos-paper-backed tiles as NNLW; other tile work still requires competent controls.

Our dedicated guide to asbestos floor tiles covers identification, the mastic adhesive trap, the paper-backing complication, and disposal in detail.

Ceilings: AIB tiles

Asbestos insulating board ceiling tiles are common in UK commercial buildings of the 1960s to 1980s. They're a subset of the AIB category covered above but worth treating separately because they're so frequently encountered.

Historic use: older AIB ceiling panels may remain above or alongside later alterations
Typical locations: Suspended ceiling grids in offices, schools, hospitals, shops, public buildings
Visual signal: tiles can be grey, white, plain or patterned. Do not lift or damage them to inspect their edge.
Friability: Moderate
Work category: licensed, NNLW or other non-licensed work depending on all relevant criteria, including exposure, task and duration

AIB and asbestos-free ceiling tiles can look alike. Do not rely on weight, softness, colour or a damaged edge; obtain reliable records and appropriate analysis.

Ceilings: Artex and textured coatings

Decorative textured coatings on walls and ceilings — the swirled, stippled, or peaked finishes popular from the 1960s into the 1980s — frequently contained chrysotile, typically at a few per cent by weight. Artex is the most familiar brand name, used so widely that "Artex" is often treated as a generic description of the finish.

Historic use: textured coatings in pre-2000 buildings may contain asbestos; an assumed 1985 cut-off is not reliable
Typical locations: Ceilings in residential properties (most common), walls in some commercial settings, decorative cornices and ceiling roses
Visual signal: Distinctive textured surface — swirled and peaked, stippled (orange-peel look), heavily stomped with a brush. Variable colours depending on subsequent decoration
Friability: Low in intact condition; higher when sanded or scraped
Risk classification: Non-licensed for routine repair; notifiable non-licensed work for larger-scale removal

Intact textured coatings are generally lower risk, but sanding, scraping and removal can release fibres. The work method and condition determine the precautions and whether notification is needed.

Treat suspect textured coatings in pre-2000 buildings cautiously. Product name, appearance or an assumed reformulation date cannot establish the composition of the actual coating.

Walls and partitions

Wall and partition systems in UK commercial buildings of the asbestos era frequently incorporated AIB as a fire-resistant or lightweight panel material.

Historic use: AIB may remain in older partition and lining systems, including behind later finishes
Typical locations: Office partition systems; plant room wall linings; lift shaft linings; behind permanent fixtures like fire surrounds; service ducts and risers; behind suspended ceiling perimeter
Visual signal: As for AIB elsewhere — fibrous grey or off-white board
Friability: Moderate
Work category: assess the AIB task against all licensing and notification criteria

The frequent error in this category is assuming that internal partition walls in a 1970s office are modern plasterboard. They may be AIB. Drilling for cable runs, wall fixings, or services without checking the panel composition is a routine cause of accidental exposure.

Heat-resistant elements: gaskets, rope seals, fire doors

Asbestos was woven into rope and braid for use as door seals on stoves, ovens, kilns, and boilers, as gaskets between flanged pipe joints, and as the core of fire-rated doors. The applications are scattered and easy to miss in a survey.

Historic use: seals, gaskets and fire-resistant components can remain in older plant and doors
Typical locations: Rope seals on the doors of stoves, ovens, and high-temperature equipment; gaskets between flanged pipe joints; lining of fire-rated doors (often AIB cores); around boiler doors and viewing ports; in some woodburning appliances
Visual signal: Rope is white, off-white, or grey braid; gaskets are flat fibrous discs or rings; fire doors look like ordinary doors externally but have AIB cores
Friability: Mid-friability
Risk classification: Non-licensed for most activities; licensed for some specific cases

Electrical: fuse-box flash guards and cable wrap

Asbestos electrical fusebox flash guard and cable wrap

Asbestos was used for electrical insulation in several forms, mostly to provide fire resistance behind or around electrical equipment.

Historic use: electrical insulation and flash guards may remain in older installations
Typical locations: Asbestos flash guards behind fuse boxes; asbestos paper backing in fuse boxes; insulating boards behind switchgear; cable wrap on older electrical installations; lining of electrical risers
Visual signal: Grey or off-white sheets, panels, or paper-like materials located behind or around electrical equipment
Friability: Variable
Work category: depends on the component and task; both asbestos controls and electrical isolation must be addressed

Check older electrical installations and the surfaces affected before drilling or opening equipment. Do not assume that a panel is asbestos-free from appearance or a single manufacture-year cut-off.

Boiler components

Older boilers and heating equipment can contain asbestos in several components. Manufacturer information, records and competent assessment are more reliable than a universal pre-1984 rule.

Historic use: older boilers may retain gaskets, insulation and other asbestos components
Typical locations: Flue gaskets and seals; insulation pads inside boiler jackets; rope seals on combustion chamber doors; asbestos paper liners; some external lagging on hot-water cylinders
Visual signal: Variable — usually only visible when the boiler is dismantled
Friability: Mid- to high-friability for some components
Risk classification: Depends on the component; ranges from non-licensed for small gaskets to licensed for lagging removal

Older boilers themselves are increasingly being replaced through normal end-of-life upgrade cycles, and the asbestos components are usually managed as part of the replacement work by competent installers. The risk emerges when DIY work or unqualified contractors disturb the components without controls.

Where to look first in a typical home

Reducing all of the above to the practical question of where to start looking in a typical UK pre-2000 home:

Loft: loose-fill insulation, cold water tank, pipe lagging, AIB around the tank
Boiler cupboard: AIB lining, flue gaskets, rope seals, sometimes pipe lagging
Ceilings: Artex textured coating, AIB ceiling tiles in some kitchens and bathrooms
Fuse box area: AIB flash guard or backing panel behind the consumer unit
Bathroom: vinyl floor tiles, AIB behind the bath, sometimes AIB ceiling tiles
Kitchen: vinyl floor tiles, AIB behind the cooker hood, sometimes AIB in airing cupboard
Garage: asbestos cement roof, asbestos cement panels
External: soffits, fascias, gutters, downpipes — all potentially asbestos cement
Stairs: asbestos paper backing on stair carpet underlays
Behind fire surrounds: AIB lining

A competent surveyor can advise on identification and scope. Management surveys support normal use; refurbishment or demolition needs information for the full affected area, normally through suitably scoped intrusive investigation.

Frequently asked questions

Which is the most common asbestos type in UK homes?

Chrysotile was widely used, including in cement and flooring, while amosite and crocidolite were used in other products. A particular building may contain several types or mixtures; appearance cannot identify them.

Is Artex always asbestos?

No. The brand or pattern does not determine composition, and coatings applied after 1985 can still be suspect. Establish the contents of the actual material before disturbance.

Do all garage roofs from the 1970s contain asbestos?

A corrugated roof on an older garage may be asbestos cement, but appearance and age are not conclusive. Do not climb onto it or take an improvised sample; cement roof sheets can also be fragile.

Can asbestos be in plasterboard?

Asbestos insulating board and other specialist panels can resemble ordinary plasterboard. Do not touch or break a panel to test its texture; use reliable records or competent sampling where needed.

Could a new build have asbestos?

New asbestos-containing construction products are prohibited, but a recent building or refurbishment date is not proof about every material. Check older retained structures, alterations and relevant records.

Is asbestos common in the airing cupboard?

Older airing cupboards can contain AIB panels, lagging or other asbestos components. Treat suspect material cautiously and avoid disturbing it while obtaining reliable information.

How do I check my boiler for asbestos?

Do not open or dismantle an appliance to look for asbestos. Use manufacturer records and a competent person to identify the components and plan the work, including gas/electrical safety and whether asbestos licensing or notification is required.

Are window sills ever asbestos?

Some interior window sills in 1960s and 70s commercial buildings were made of AIB or asbestos cement. Internal window sills in domestic properties are less commonly asbestos but not impossible — particularly composite or moulded sills from the asbestos era.

This page is the reference; the actions you take after identifying a suspected material are covered separately. For what to do if you've been exposed to or disturbed asbestos, see our practical guide. For the legal framework that governs the management of these materials in UK premises, see the Control of Asbestos Regulations 2012 and our guide to the duty to manage asbestos under Regulation 4.

For workers and supervisors whose work in pre-2000 buildings means encountering these materials is foreseeable, our CPD-certified Asbestos Awareness Course covers the training required under Regulation 10 of the Control of Asbestos Regulations 2012.

Make sure your team is trained to recognise asbestos-containing materials.

Explore the Asbestos Awareness Course →

Sources & references

Mark McShane

Health & Safety Training Specialist, Online CPD Academy

Mark writes about workplace health & safety, asbestos awareness and accredited online training for Asbestos Awareness Course, part of Online CPD Academy.