What is asbestos encapsulation?
Asbestos encapsulation means sealing the surface of asbestos cement so that it can stay in place for now, instead of being removed. A coating is applied over sound roof sheets, without disturbing them, to bind the surface and protect it from the weather. It’s a way to manage an asbestos roof that is still in reasonable condition, not a way to make the asbestos disappear.
Where the original asbestos cement sheets on a factory, apartment block, school or older home are still sound, asbestos encapsulation in Cape Town can be a sensible, lawful option.
When is encapsulation suitable?
Encapsulation is worth considering when:
- the sheets are intact, with no significant cracking, breakage or crumbling edges
- you want to keep the building as it is for now, and removal can be planned later
It isn’t the right answer when:
- the sheets are cracked, brittle, broken or badly weathered, because a coating can’t hold together material that is already failing
- you plan to install solar panels, because panels can’t be mounted on asbestos cement; see solar on asbestos roofs
- alterations, extensions or roof work that would disturb the sheets are planned
- the roof leaks because the sheets have failed
In those cases, asbestos roof removal followed by a new roof is usually the better spend, planned together through asbestos roof replacement. At the inspection we’ll tell you honestly which option suits your roof.
Who carries out the work
Under the Asbestos Abatement Regulations, 2020, the repair or encapsulation of asbestos cement products without surface preparation is Type 2 asbestos work, which needs a Type 2 registered asbestos contractor (regulation 1).
On our projects, encapsulation is carried out by asbestos-trained workers under the registration of our sister company, Indi Maintenance Services, a Registered Asbestos Contractor (Type 2), certificate 2025RAC/CI-180, valid until 26 August 2028. Roof Direct inspects the roof and coordinates the project, and Indi quotes the asbestos work, so you have one point of contact throughout. The plan of work and asbestos documents carry Indi’s name.
Why is there no surface preparation?
Because the law prohibits it. Regulation 24 says no person may clean or prepare the surfaces of asbestos cement materials, and no one may use power tools to cut, grind or drill asbestos, or compressed air to blow off dust.
On an asbestos roof, washing, scraping or treating the surface would break it up and release fibres. So there is no pressure-washing, scrubbing, wire-brushing, sanding or scraping: the coating goes on over the roof as it is. This is also why a roof with heavy moss or lichen, or one that is breaking up, may not be suitable.
How an encapsulation project works
As Type 2 work, encapsulation follows the same legal framework as removal:
- Inspection. We check the condition of the sheets, ridges, fixings and gutters, and tell you whether encapsulation is suitable.
- Itemised quote. Indi sets out the work and, where relevant, the alternatives.
- Plan of work and notification. The approved inspection authority compiles the plan of work with Indi, you co-sign it as the client, and the Department of Employment and Labour is notified in writing at least seven days before work starts (regulations 10, 11 and 15).
- A regulated area. The work area is demarcated with the prescribed signs, and nobody enters without the right respiratory protection and protective clothing (regulation 18).
- The coating. The coating is applied without cleaning, scraping or otherwise disturbing the sheets.
- Clearance. The approved inspection authority inspects the work area, takes air samples and issues the written declaration for clearance certification (regulation 22).
What encapsulation does not do
The roof is still an asbestos cement roof, and it still can’t be drilled, cut, cleaned or walked on carelessly.
For workplaces, the regulations require asbestos to be recorded in an inventory of asbestos in place, reviewed at least every 24 months and revised when material is sealed, coated or encapsulated (regulation 4). An asbestos risk assessment and a written management plan, including a plan for phasing asbestos out over time, are also required (regulations 5 and 6). Encapsulating a roof changes the entries, not the duty. This is general information, not legal advice; for the official text, see the Department of Employment and Labour.
Encapsulation and painting
Painting asbestos cement without surface preparation and without releasing fibres is classed as Type 1 work, while repair or encapsulation is Type 2. Where it’s unclear which applies to a coating, an approved inspection authority or the Chief Inspector decides (regulation 14). Because the coating on the asbestos roofs we coordinate is applied under Indi’s Type 2 registration, the work meets the rules either way. See painting asbestos roofs.
Encapsulation for commercial, body corporate and home roofs
- Commercial and industrial. Encapsulation can protect sound sheets on large roofs while you plan and budget for replacement, with the regulated area planned around your operations. See commercial and industrial roofing.
- Body corporates. Trustees can table encapsulation and replacement side by side where both are options. See body corporate roofing.
- Homeowners. The same rules apply to a house as to a factory, and they are followed in full.
On the Atlantic Seaboard, in Blouberg and up the West Coast, salt air and wind make the condition of the sheets matter even more.
Get a free encapsulation assessment
Request your quote, call us, or send photos on WhatsApp; for all our asbestos services, see asbestos removal in Cape Town.