1960–1980 · High-rise, low-rise, CLASP, Reema, Bison
System-built housing — the highest-risk stock in the UK.
Between 1960 and 1980, roughly 1.5 million UK homes were built using industrialised system-build methods: Reema, Bison, Wimpey No-Fines, CLASP for schools, Larsen-Nielsen for towers. All of them used AIB, sprayed asbestos and pipe lagging as standard fire-protection.
Overview
What actually matters in 1960s–70s system-build.
System-build was a response to the post-war housing crisis. Speed was everything, and asbestos insulating board was the fastest way to meet building-regulation fire-protection requirements around structural steel, service risers and inter-flat compartmentation.
The result is a national stock where AIB behind every service riser panel, sprayed limpet coatings on structural columns, and pipe lagging through communal corridors are routine findings. Grenfell has focused public attention on cladding, but for these blocks asbestos remains the daily management challenge.
For local authorities and housing associations, a portfolio-scale programme of duty-to-manage surveys, quarterly re-inspections and pre-works R&D surveys is the only defensible position. Individual leaseholders in these blocks also carry residual duties for their own demise.
Era-by-era context
What was original, and what got added later.
Structural fire-protection
AIB casings to columns, beams and service risers were near-universal. Often sprayed with limpet asbestos coatings on top.
Compartmentation
AIB partitions between flats and to service cupboards — often behind later plasterboard overlays.
Heating installations
District heating pipe lagging, boiler-house insulation, calorifier jackets.
Finishes
Thermoplastic floor tiles, Artex to communal ceilings, cement flues, cement rainwater goods.
Typical asbestos locations
Where we find it most in 1960s–70s system-build.
AIB service-riser panels
The single most common finding in system-built blocks. Encountered every time a plumber accesses a stack.
Sprayed limpet coatings on columns
High fibre-release potential; usually encapsulated or overclad and inspected annually.
Pipe lagging in communal corridors
Often visible in service cupboards and above suspended ceilings.
AIB inter-flat partitions
Behind plasterboard overlays — easy to disturb during flat refurbishment.
Thermoplastic floor tiles
Communal-area 'Marley' tiles throughout landings and stairwells.
Roof-level plant rooms
Boiler insulation, water-tank lagging, cistern liners — often deferred and disturbed during roof works.
Common scenarios
The situations clients come to us with.
Portfolio duty-to-manage programme
We deliver council- and HA-wide surveys with a unified register, portal access for every property, and a quarterly re-inspection schedule that meets HSE expectations.
Void turnaround
Rapid R&D-level inspection between tenancies so any disturbance during void works is fully understood before contractors are appointed.
Capital works and cladding replacement
Full R&D survey of every element being altered — external walls, insulation zones, roof plant, service risers.
Leaseholder-triggered enquiry
Where a leaseholder wants to alter their demise, we survey the flat and issue a report that meets both the freeholder's and the contractor's requirements.
Recommended surveys and services
The right survey for the job — no upselling.
We are consultancy-only. Every recommendation is scored on risk, not scope of work.
Management Survey (communal parts)
For freeholders, councils and housing associations managing the block as a whole.
See what's includedRefurbishment & Demolition Survey
Required before any capital works, cladding replacement, void refurbishment or riser access.
See what's includedHousing Associations industry hub
How we support HAs across void turnaround, Awaab's Law and Decent Homes.
Open the HA hubFrequently asked
1960s–70s System-Build — the questions clients ask us first.
How much of my block is likely to contain asbestos?
In our data, system-built blocks average 25–40 discrete ACM occurrences per staircase — most in service risers, communal ceilings and boiler rooms.
Do individual leaseholders need their own survey?
Yes if they intend to alter their flat. The freeholder's register covers the communal parts, not what sits behind the leaseholder's plasterboard.
Explore further
More reading for 1960s–70s system-build
Guides, FAQs and industry hubs that connect to this property type.
Industry
Schools — Industry Hub
Independent, DfE-aligned asbestos consultancy for UK schools, academies and multi-academy trusts. Management surveys, refurbishment surveys, annual re-inspections and duty-to-manage support from senior consultants who never quote for removal.
ReadIndustry
Housing Associations — Industry Hub
Independent asbestos consultancy for housing associations, ALMOs and registered providers. Stock-condition surveying, void turnaround, planned maintenance, decant projects and 24/7 incident response — CAR 2012 and RSH-aligned.
ReadIndustry
Hospitals — Industry Hub
Independent asbestos consultancy for NHS trusts, private hospitals and clinical estates. Ward-live management surveys, refurbishment surveys, backlog maintenance support and 24/7 emergency response — all UKAS 17025 accredited.
ReadIndustry
Offices — Industry Hub
Independent asbestos surveys for offices, HQs, managed workspaces and multi-let workplaces across the UK. Pre-fit-out, dilapidations, CAT-A and CAT-B refurbishment surveys and portfolio management for landlords, tenants and agents.
ReadIndustry
Care Homes — Industry Hub
Independent asbestos surveys and duty-to-manage support for UK care homes, nursing homes and supported-living providers. Resident-safe scheduling, CAR 2012 compliance, refurbishment surveys and 24/7 incident response.
ReadGuide
Why Do I Need To Survey A Communal Staircase?
Communal staircases in flats often contain Artex, AIB and cement products. Learn why a survey is required, who pays, and what a typical inspection covers.
ReadTalk to a senior consultant about 1960s–70s system-build.
Every enquiry is reviewed by a senior consultant and answered within one working day.