What is Asbestos Encapsulation?
Encapsulation is the process of sealing asbestos-containing materials (ACMs) to prevent the release of hazardous fibers into the air. Instead of removing the materials entirely, a sealant or enclosure is applied to keep the fibers contained. This method is typically used when the asbestos is in a stable, non-friable condition and is not currently releasing fibers.
There are two main types of encapsulation: bridging encapsulants and penetrating encapsulants. Bridging encapsulation creates a protective layer or barrier over the surface of the contaminated material. Penetrating encapsulation, on the other hand, is where the special adhesive or solution soaks into the asbestos-containing material to bind all of the fibres together internally, avoiding loose fibres.
When applicable, some property owners may opt for encapsulation over abatement to save on asbestos removal costs, but while it can be a cost-effective solution for low-risk environments, it is still a short-term option. Eventually, as contact occurs and time degrades materials, asbestos removal in Edmonton will become necessary for the overall well-being. Also, in some cases, encapsulation isn't a viable option. This is especially true of properties that have friable asbestos.
Friable vs Non-Friable Asbestos
To understand when asbestos should be removed versus encapsulated, it's essential to know the difference between friable and non-friable asbestos.
Friable asbestos crumbles easily when touched or handled and can release fibers into the air, making it highly dangerous. This is often found in older insulation, drywall compounds, and ceiling tiles. Removal is almost always the recommended solution.
Non-friable asbestos is more stable and does not release fibers as easily unless it is disturbed (e.g., during renovations or demolitions). Materials like asbestos cement or floor tiles can sometimes be left in place if encapsulated properly.
Alberta's OHS Code and the Canadian Guidelines for Asbestos Management both dictate that friable asbestos must be addressed immediately by licensed professionals. Non-friable asbestos can be encapsulated but still requires regular monitoring.