Asbestos Roof Sheeting Lichen


Asbestos Roof Sealing & Asbestos Encapsulation

Many commercial, residential and industrial buildings in South Africa still have asbestos roofs, despite asbestos products having been banned since 2008. Replacing asbestos products is expensive and hazardous. Crommelin SA provide a specialist product to deal with the problem and extend the life of asbestos procducts safely and within the confines of the regulations.

Hazards of asbestos roof cleaning and removal

Many years of exposure to the elements weathers the surface of asbestos roof sheeting. This develops a loose, friable surface layer susceptible to colonization with dark lichen and moss.

The lichen penetrates the surface cement and this exposes the harmful asbestos fibres below. This weakens the asbestos roof sheeting and reduces the insulation properties of the roof, causing a substantial increase in roof cavity temperatures.

Hazardous airborne fibres are a primary concern, especially when asbestos roof sheeting is removed. The preferred method to deal with asbestos roofs is to seal them, effectively encapsulating the asbestos fibres, and extending the lifetime value of the roof.

Sealing asbestos roof sheeting

Legislation now makes it imperative to reseal asbestos roofs. Traditional methods of cleaning the unstable surface, with high pressure water jets have been banned because of health concerns. Abrasive cleaning is even more dangerous. Encapsulation is the safest, cheapest alternative to asbestos roof sheeting removal.

Crommelin Fibroseal Primer was developed to soak through the lichen and friable asbestos surface to the sound base material below, effectively binding these elements and sealing the asbestos roof. Fibroseal Topcoat is then coated onto the primed surface. This durable protection is UV resistant, resists the regrowth of lichen and moss and is decorative.





Fibroseal® Primer

Controlled treatment and encapsulation of asbestos roofs

Fibroseal® Primer is a waterborne penetrating treatment to weathered asbestos cement sheeting that soaks through the lichen and degraded asbestos down to sound base material, binding these unstable elements.

When used together with Crommelin Fibroseal® Topcoat, the product forms part of the Crommelin Fibroseal®  System, a proven encapsulation system used throughout Australia since 1990.


Fibroseal® Topcoat

Fibroseal encapsulation is an effective and economic alternative to roof replacement

Fibroseal® Topcoat is a waterborne high-build elastomeric roofing membrane. Fibroseal® Topcoat is applied to a weathered asbestos cement surface that has been pre-treated with Crommelin Fibrosealâ Primer to provide a durable, decorative, lightfast protective coating. 

Active ingredients in Fibroseal® Topcoat also resist the regrowth of moss and lichen.

When used together with Crommelin Fibroseal® Primer, the product forms part of the Crommelin Fibroseal® System, an accredited and proven encapsulation system used throughout Australia since 1990.


Articles & News



The Benefits of Crommelin Encapsulation

While asbestos removal may seem like the obvious choice for dealing with asbestos, it’s often complicated, expensive and can result in extensive downtime. 

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Posted by Stewart Maybery on Thursday, September 12, 2019 Views: 3104



Asbestos Roof Sealing in South Africa

Hundreds of thousands of buildimgs, warehouses, factories, apartment and office buildings are constructed using asbestos roof sheeting and other asbestos based or containing products. Many of these asbestos products are weathered, have become damaged and the risk of airborne asbestos fibre is increasing all the time.

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Posted by Stewart Maybery on Wednesday, August 28, 2019 Views: 8664