You will find expert answers, tips and valuable information on a wide range of topics such as mould, foundations, heating, building permits and insurance issues with your home.(Note: The information below was provided to me to use on my website and has been authorized by Amerispec home inspection services of Mississauga) Back to main index for home inspections General Industry topics related to Homes, home inspectors and home inspection issuesAsbestos Issues I am doing renovations on my home and my contractor says there is asbestos in my home that has to be removed. Is asbestos really a concern and what types of building materials may contain asbestos? As previously mentioned, when asbestos is used today, it means it is likely chrysotile asbestos which is much less harmful than the type of asbestos used in the past. Until the 1980's asbestos was of the amphibole type and people were not aware of the risks in using this type of material. Due to the biopersistence of amphibole asbestos, workers who were exposed to the dust in large quantities over long periods of time became ill between 10 and 40 years after working with the material. It is important to note that the asbestos particles must be airborne (friable) to be inhaled, and therefore be a health concern. Due to its unique characteristics, asbestos has been used for a wide variety of materials for approximately 4500 years. It is heat, chemical, and wear resistant, and is an excellent heat and electrical insulator. Today, chrysotile asbestos is mainly used in applications where it is encapsulated, such as in concrete and in vehicle brake lining and clutch facings. During the period from approximately 1930 to 1980 it was widely used in residential applications in insulation (pipe and duct wrap and unintentionally in vermiculite), floor and ceiling tiles, acoustical plaster, shingles and other roofing materials, and exterior siding. Although these types of materials are no longer used in modern construction, they may still be present in older homes. In these types of applications there is the potential for the asbestos particles to become friable. Laboratory testing is required to absolutely confirm or deny the presence of asbestos in building materials. During the home inspection, materials that are suspected to contain asbestos will be highlighted, however testing for the presence of asbestos is outside of the scope of a basic home inspection. Once testing has been performed and a material is certain to contain asbestos, the material should be examined closely. If the material is in friable (damaged) condition, it should be removed by a professional asbestos abatement contractor. This is typically a very expensive undertaking, however because asbestos is a potential health risk it is necessary. Removing asbestos will cause the particles to become airborne and create a potential health risk and should never be undertaken by a homeowner. A professional contractor will seal and ventilate the area containing asbestos from the rest of the house and wear protective clothing and masks. In some cases asbestos containing materials can be encapsulated with another material so that the risk of damaging the asbestos containing material is minimized. This type of procedure may be a less expensive option to removing and disposing of the asbestos containing materials. All provinces have regulations regarding the removal and disposal of asbestos containing materials; check that the abatement contractor that was hired will follow all applicable regulations. If the asbestos containing material is in good condition (not friable), it should not be disturbed. Leave insulation alone, do not put holes in or damage ceiling tiles, and don't sand or remove floor tiles. If during renovations, however, asbestos containing materials are discovered and will be damaged, they should be professionally removed as described above.
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This GUIDE TO HOME INSPECTION was prepared by the
leading network of property and home inspection services in North America, AmeriSpec of Canada. For further information, please visit us at
www.amerispec.ca
or call
1-800-263-5928.
The home inspection benefits all parties involved in the real estate transaction. For further information or to arrange an inspection with a qualified home inspection company, consult your local real estate professional.
in closing...
For more information on house inspection issues, please contact Amerispec Home Inspection Services
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