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Commercial Spray Foam

Spray Foam Asbestos Encapsulation

Lock down asbestos fibres and stop condensation in a single application. A non-licensed, fully warrantied spray foam system for warehouses, farms and industrial units — installed UK-wide.

Non-licensedEncapsulation system
EnvergeApproved system
2-in-1Seal + insulate
Spray Foam Asbestos Encapsulation by ThermoFoam — Duratite Group
Overview

Why spray foam for asbestos roofs

Ageing asbestos cement roofs and wall sheets are common across warehouses, farm buildings and older industrial units. As the sheeting weathers, the surface breaks down and weakens, raising the risk of loose fibres, leaks and dangerous working at height. Full removal means licensed work, controlled disposal, scaffolding and weeks of downtime — a heavy cost and disruption for a still-functional building.

Enverge closed-cell spray foam offers a controlled alternative. Applied directly over the asbestos cement, it self-bonds to the substrate as it cures and forms a continuous, rigid layer that locks down the surface and seals the fibres in place. Encapsulation is a non-licensed process, so it avoids the cost, disruption and disposal burden of stripping the roof out entirely.

The result is an asbestos cement structure that is sealed, strengthened and insulated in a single pass. Loose fibres are bonded behind a tough monolithic skin, condensation that degrades the sheeting is reduced, and the building stays watertight and usable — extending its service life without the upheaval of a full removal programme.

Why spray foam

The benefits for asbestos roofs

No Removal Needed

Encapsulates asbestos cement in place — avoids stripping out and replacing the entire roof or wall.

Non-Licensed Process

Sealing fibres behind a bonded layer is non-licensed work, simplifying programme and approvals versus licensed removal.

Lower Cost & Disruption

Skips controlled disposal, full scaffolds and weeks of downtime, keeping the building operational throughout.

Locks Down Fibres

Self-bonds to the sheeting and forms a continuous rigid skin that holds loose surface fibres in place.

Stops Condensation

Closed-cell foam blocks the warm-cold interface that drives condensation and accelerates asbestos sheet degradation.

Extends Roof Life

Seals, strengthens and weatherproofs tired sheeting, adding years of useful life to the structure.

Closed-cell spray foam applied to asbestos roofs by ThermoFoam
The system

Certified, in-situ encapsulation

We use Enverge closed-cell spray foam to encapsulate and insulate in a single application — bonding tightly to cement-fibre and metal substrates.

Enverge closed-cell foam (Nexseal LE / Nexseal 2.0) is spray-applied directly onto the prepared asbestos cement and self-bonds as it cures into a rigid, closed-cell layer. Because it adheres monolithically without fasteners or boarding, it locks down surface fibres, adds structural stiffness to the sheet and forms a continuous insulating, vapour-resistant barrier in one pass.

  • Non-licensed encapsulation — no costly asbestos strip-out
  • Self-bonds over sheeting, locking fibres in place
  • 25-year manufacturer-backed product warranty
  • Insulates and weatherproofs in a single application
Discuss your project →
Technical data

Enverge Nexseal LE — verified performance

Thermal conductivity λ0.027 W/m·K · BS EN 14315-1
Reaction to fireClass 1 · BS476 Part 7
Compressive strength78 kPa · BS EN 14315-1
Water vapour resistanceμ 62 · BS EN 12086

Typical published values for Enverge Nexseal LE closed-cell foam. Full technical specification →

In detail

Specification & compliance for asbestos roofs

For duty holders managing asbestos cement roofs, encapsulation is often the pragmatic route: closed-cell foam sprayed to the underside locks fibres in place, seals the sheet and insulates the building in the same single application — typically at a fraction of removal-and-replacement cost, and without the disruption.

Every roof is condition-assessed first, and the work sits within the duty holder's wider management plan under the Control of Asbestos Regulations. The encapsulated roof stops leaking heat, stops condensation drip, and is documented for the asbestos register at handover.

ApproachNon-licensed encapsulation
ComplianceSupports the HSE duty to manage
ResultFibres locked + insulated in one pass
AssessmentCondition-checked before any work
UK-wide

Where we install asbestos roofs spray foam

Dedicated local pages for every major city — and we cover the towns and villages between them.

How it works

From enquiry to warranty

1

Enquire

Tell us about your asbestos roofs & building.

2

Survey

Free survey of your asbestos roofs & condensation check.

3

Specify

The right system for your asbestos roofs.

4

Install

Approved applicators, minimal disruption.

5

Warranty

Handover pack & 25-year warranty.

Recent work

Real asbestos roofs spray foam applications

Spray foam insulation applied to asbestos roofs — real Duratite Group projectSpray foam insulation applied to asbestos roofs — real Duratite Group projectSpray foam insulation applied to asbestos roofs — real Duratite Group projectSpray foam insulation applied to asbestos roofs — real Duratite Group projectSpray foam insulation applied to asbestos roofs — real Duratite Group projectSpray foam insulation applied to asbestos roofs — real Duratite Group project
Proof

Commercial projects

Free survey

Get a quote for your project

Send us your building details and our technical team will specify the right system and a clear budget. No obligation.

01208 832 602Mon–Fri, 8am–5pm
info@thermofoam.co.ukWe reply within one working day
25-yr product warrantyDocumented, surveyor-ready installs
Book your free surveyNo obligation · we reply within one working day
FAQs

Asbestos Encapsulation insulation, answered

Do I need to remove the asbestos first?

No. Encapsulation seals the asbestos cement in place rather than removing it. The spray foam bonds over the existing sheeting and locks down the fibres, avoiding the cost, scaffolding and controlled disposal that full removal requires.

Is spray foam encapsulation licensed work?

Encapsulation of asbestos cement is generally a non-licensed process, as it seals fibres behind a bonded layer rather than disturbing or stripping the material. We assess each site and work in line with current asbestos regulations before any application.

Will it pass a management asbestos survey?

An encapsulated roof remains recorded on your asbestos register as managed in situ. Sealing the sheeting behind a bonded foam layer supports a management plan by reducing fibre release risk. Your surveyor confirms the approach for your specific building.

Does it stop the roof leaking and sweating?

Yes. The closed-cell layer is watertight and self-bonds to the sheeting, sealing splits and porous areas. It also cuts the condensation that forms on cold asbestos sheets and accelerates their breakdown, keeping the interior dry.

What buildings is this suitable for?

Commercial and industrial structures with asbestos cement roofs or cladding — warehouses, factories, farm and agricultural buildings, and older industrial units. We work on commercial sites only; call 01208 832 602 to arrange a survey.

Is spray foam encapsulation legal for asbestos roofs?

Yes — encapsulating asbestos cement in good condition is a recognised, non-licensed management route under the Control of Asbestos Regulations, subject to assessment.

Is encapsulation cheaper than removal?

Substantially, in most cases — and it insulates the building in the same pass, which removal alone never does.

Is the roof assessed first?

Always — condition is checked by a competent assessor before any work is proposed, and the result is documented for your asbestos register.

Insulate your asbestos roofs the right way

Specialist commercial spray foam, installed UK-wide by the Duratite Group's spray foam specialists.

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