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Asbestos containing materials ( A.C.M ) have been utilised as building, insulation and fire protection materials throughout the construction industry for many years.  Asbestos containing materials have been utilised in a variety of products.  In older buildings, refurbishment and renovation works may have been carried out utilising asbestos materials within the works and also overlaying asbestos containing materials with multi-layers of plaster, plasterboard and other timber products such as plywood and hardboard. 


Asbestos  "Limpet" Sprayed Coating

This is a loosely bonded, highly fibrous coating.  Usually only one type of asbestos fibre is present in this material with an asbestos content of at least 50%.  This form of coating is normally encapsulated by some form of surface seal.  If the surface seal is defective, ‘Limpet’ coating is potentially very friable and can suffer from unexpected collapse.


Asbestos thermal insulation (plastic magnesia type)

This is a loosely bonded fibrous composition, with binder and filler powders, that is mixed on site and applied by hand.  The asbestos content is often highly variable, but some 15% to 40% of asbestos is commonly present.  A mixture of one or more types of asbestos fibre may be present in the material.  Some form of painted surface seal normally encapsulates this form of insulation.  If the surface seal is defective this form of insulation is very friable.


Asbestos thermal insulation  (corrugated paper type)

This is a factory made sectional product formed of corrugated asbestos paper.  The asbestos paper contains up to 100% of white asbestos (Chrysotile), but the material is not liable to be friable under normal handling circumstances.


Asbestos Insulating Board

Asbestos insulating board (“Asbestolux” type) is a relatively soft off-white board, which is deceptively friable. The total asbestos content of insulating board is normally between 16 – 40%. The most common form of asbestos insulating board contains brown asbestos (Amosite) alone, or with a few percent of white asbestos (Chrysotile)


Asbestos Cement

Asbestos cement products normally contain about 10-15% of asbestos, in a hard durable, non-friable cement matrix.  The most common form of asbestos cement contains white asbestos alone.


Asbestos Flash Strips (Fused Switchgear/Fuse boxes)

In many locations asbestos flash strips are to be found within fused switchgear/fuse boards behind ceramic fuses.  The flash strips are formed from a raw, friable asbestos blanket material which, protects the ceramic from damage when the fuse wire melts.  Such fused switchgear/fuse boxes are classed as asbestos contaminated and must have ‘asbestos warning’ signs applied.


Thermoplastic Floor Tiles

Typically used throughout many variations of building as decorative flooring. The asbestos is of a very low content within this type and is used as a bonding material.


Textured Coating

Similar to thermaplastic floor tiles in its asbestos content and decorative use. Used in many buildings as a decorative finish. Again, a low content of asbestos used as a bonding material.


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