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Jane Chen
Sales Representative

RE/MAX Realtron Realty Inc.
Independently owned and operated

Phone: 905-470-9800  Fax: 905-470-7770  Mobile: 416-418-9568

Dealing with mould, asbestos and vermiculite

January 24, 2013 - Updated: February 9, 2013

Mould, asbestos and vermiculite are often misunderstood. When people come across it – either through an inspection of a home that is being contemplated in a purchase or while living in their home – they have certain preconceived ideas that may not result in the optimal, most educated decisions on how to treat it in their specific situation.


Mould: Moulds are microscopic fungi that actually grow in every home. It is only a substantial amount of mould, affecting the structure of the home and/or toxic mould that should be a big concern.


If there is mould but it covers less than a square metre, it is considered “small” (even up to three small patches are not a significant concern).  In these cases, the homeowner can safely, quickly and effectively clean it up without the help of an expert. 


t is important to clean them when they are first noticed because it can become more of a problem if ignored. The homeowner must follow precautions to keep moisture levels in the home at a minimum. This can mean the difference between a few dollars and a couple of thousand if the problem is caught early and treated properly. The Home Inspection Network has a comprehensive document on mould that elaborates and can be found at


If the mould comes back after cleaning or it is located in larger areas, hiring an expert is recommended. This would be an experienced person who has come across mould issues and has practical knowledge of remediating. We do not recommend testing the air, because where it is determined that there is a mould problem, the cost of testing may be better spent hiring a professional investigator or fixing the problem.


Asbestos and vermiculite: Both asbestos and vermiculite are natural occurring minerals that have been used in a variety of commercial products, especially insulation, electrical products and in many products around the house (caulking, shingles) due to their ability to insulate and slow down fires. Both asbestos and vermiculite are now regulated, controlled and contained in products made since the 1990s.


Health Canada and the U.S. Environmental Protection Agency (EPA) state that asbestos and vermiculite, when contained and not exposed to the home or interior environment, pose very little health risk. They pose health risks only when fibres are in the air that people breathe. This can happen when asbestos-containing products break down, either through deterioration as they age or when they are cut. People can put themselves at risk – often without realizing it – if they do not take proper precautions when repairs or renovations disturb materials containing asbestos.


The agencies recommend that if you do not need to disturb the material, seal it up. This includes sealing all cracks and holes in the ceilings of the rooms below the insulation by apply caulking around window and door frames, along baseboards and around electrical outlets. Additional insulation can be put on top of the vermiculite, typically costing about $500 to $1,000, depending on the home and the insulation used.



If the homeowner is in doubt and/or wants to do some renovations or remodelling in the area, a professional who is trained and qualified to handle vermiculite and asbestos removal should be hired before proceeding with any work. These products, when disturbed, can spread throughout the home, causing serious health problems and more expenses down the road.








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