Seal the sheets in place instead of stripping them off — no removal, no disposal, and the building keeps working. Free survey, then a fixed-price quote.
Sealed in place — top sideclosed-cell roofing foam + S42 silicone top coatThat is the whole service: the roof sheets, sealed where they are, from above or from below. We do not encapsulate Artex, floor tiles, pipe lagging, ceiling panels, walls or cladding — if your asbestos is anywhere other than a roof, a licensed asbestos surveyor or removal contractor is the right call.
Encapsulation manages an asbestos cement roof by sealing the sheets where they are, rather than stripping them off. A closed-cell foam is bonded to the sheets so the fibres are locked in, the roof is protected and its life is extended — with no removal, no disposal and minimal disruption.
Sound asbestos cement in reasonable condition can be managed in place under the Safety, Health and Welfare at Work (Exposure to Asbestos) Regulations 2006 (ROI) and the Control of Asbestos Regulations (Northern Ireland) 2012, so in most cases the building keeps working right through the job — no scaffolding-heavy removal, no skips of licensed waste and no weeks of closure.
Nexseal LE is a closed-cell spray polyurethane foam applied to the underside of the sheets from inside the building. At a minimum application thickness of 25mm it permanently bonds to and seals the interior face of every sheet, locking the fibres in while insulating the building and controlling condensation.
Best for: buildings where condensation is the problem, where internal thermal performance is needed, or where roof access from above is impractical.
closed-cell roofing foam is applied to the top surface of the sheets from above. It encapsulates the exterior face of every sheet, fills laps, fixings and ridges into one seamless weatherproof deck, and is finished with a GacoFlex S42 silicone top coat for UV resistance and long-term waterproofing.
Best for: roofs where water ingress or weathertightness is the priority, roofs approaching end of life, or where access from above is straightforward. Coating-only waterproofing without foam is also available — see asbestos roof waterproofing.
Removal and re-roofing costs considerably more, plus specialist disposal — with scaffolding, exclusion zones and a 1–4 week closure of the area.
Encapsulation seals the sheets where they are, priced after a free site survey, and the building normally keeps working right through the job.
Sheets sound but weathered → encapsulate, top side or underside
Condensation dripping inside → underside Nexseal LE seals and insulates
Leaking or weathered top → closed-cell roofing foam + S42 silicone top coat
Building can’t close → sealed in place, doors stay open
Badly damaged or broken sheets → the survey tells you straight — removal is then the right call
The foam bonds to the sheets and locks the asbestos fibres within a mechanically stable matrix. Unlike thin paints, it cannot peel, flake or crack away over time.
The sheets stay exactly where they are. No removal contractor, no disposal costs, no consignment notes — the job is done in a fraction of the time and cost of a strip-out.
Closed-cell foam bonds to and stiffens asbestos cement that has turned brittle over decades — the composite of foam and sheet is far stronger than either alone.
With λ = 0.025 W/mK, Nexseal LE improves the roof's U-value even at 25mm — underside encapsulation can cut roof heat loss by 40–60%.
Closed-cell foam raises the sheet surface above the dew point and acts as an integral vapour barrier — condensation dripping stops immediately.
Both routes extend the service life of the roof by 20 years or more from application, deferring or eliminating full roof replacement.
Underside and top side encapsulation on real industrial, agricultural and commercial buildings.
If the roof sheets are asbestos cement, we can survey and encapsulate them — top side or underside.
Distribution, storage and logistics units — underside encapsulation keeps racking and stock in place while the roof is sealed and insulated.
Working factories kept operational throughout — the works are planned around shifts and production lines.
Workshops, trade counters and light-industrial units with corrugated asbestos cement roofs.
Barns, grain stores and livestock housing — condensation control from underside encapsulation is often the biggest win.
Schools, leisure and civic buildings managed under a duty-to-manage plan.
Top side encapsulation seals and waterproofs a failing asbestos roof in one system.
Send the building type, roof, location, area and photos.
We assess the sheets' condition, access and which route suits.
Top side, underside or both, with a fixed price and RAMS.
Applied in place with the correct controls — no strip-out.
Completion pack, records and the applicable warranties.
Recent closed-cell spray foam and Gaco coating projects — the same approach we use to encapsulate asbestos cement roofs.
Send the building type, roof condition and a few photos. We confirm the right route — top side, underside or both — and come back with a fixed price. No obligation, no hard sell.
✓ Free site survey and sheet-condition assessment
✓ Fixed-price quote — no per-item surprises
✓ RAMS and asbestos-regulation-compliant controls
✓ Completion pack for your asbestos register
External encapsulation is two layers: closed-cell roofing foam sprayed over the cleaned sheets, then a liquid top coat that does the waterproofing. Duratite supplies all three top-coat chemistries — silicone, urethane and polyurea — and all three carry a 20-year manufacturer-backed product warranty. So the right asbestos roof coating is specified on substrate, exposure and foot traffic, never on warranty length.
Silicone
The usual choice of asbestos roof sealant on warehouse, factory and agricultural roofs. Seamless, UV-stable and untroubled by standing water. SF42 is fibre-reinforced; S42 is not. Both can be spray, brush or roller applied.
The 20-year term is film-build dependent — a heavier build earns the longer term — so we quote you the build, not just the number.
20-year manufacturer-backedUrethane
Specified where the roof takes regular foot traffic. U91 is a single-component moisture-curing polyurethane with higher abrasion resistance than silicone. U92 is a two-component heavy-duty urethane for plant rooms, walkways, industrial decks and podium structures, with excellent chemical resistance.
20-year manufacturer-backedPolyurea
A two-component polyurea top coat, applied by plural-component spray. It is a specialist application carried out by trained operatives, and it is specified over encapsulation foam where a heavy-duty seamless finish is wanted.
20-year manufacturer-backedAll three warranties are manufacturer-backed product warranties — never insurance-backed — issued by Duratite. The roofing foam beneath the coating is supplied as either Gaco or Purios, chosen per job.
Get a top-coat recommendationTell us about your building and we’ll recommend the right system — foam, waterproofing or both — surveyed, specified and quoted at no cost.
