Asbestos Roof Tiles Nz

Review of the scientific evidence of non occupational risks.

Asbestos roof tiles nz.

Decramastic tiles are a scallop shaped metal tiles also known by other names such as pressed metal tiles decrabond and stone chip roofs. Asbestos is found in some vinyl floor tiles and linoleum and as backing on vinyl sheet flooring and adhesives. Tiles which contain asbestos include mastic or bitumen based pressed metal roof tiles that were produced prior to the early 1980s. Houses built up until the late 1990s should be considered as possibly containing asbestos materials or products.

This will happen as soon as possible in 2017. Asbestos exposure in new zealand. Chrysotile fibres tend to break across the fibre so become shorter and remain thicker than the crocidolite and amosite fibres. Asbestos in new zealand houses.

Ahi roofing limited intends to work with the roofing association of new zealand and to help installers and removalists deal with these issues in practice. Asbestos in early pressed metal stone coated roofing tiles prior to early 1980s. Due to the presence of asbestos decramastic tiles are no longer manufactured and have been replaced. Some versions of mastic or bitumen based pressed metal roof tiles produced prior to the early 1980s contain asbestos.

All mastic or bitumen based pressed metal roof tiles should be suspected of containing asbestos. Examples of asbestos in homes. You will find that existing asbestos roofs have probably been in place for many years and in the case of the new zealand naval dockyards the material had weathered and protected their facilities for close on 65 years right on the coast in the most severe environment with no corrosion or breakdown of the substrate. But other types of roof tiles containing asbestos also exist.

In new zealand most houses built before 1975 have a high probability of containing asbestos building products and materials as well as asbestos insulation products in their construction. Asbestos cement materials will typically last about 50 60 years any asbestos cement roofing that shows evidence of damage such as broken roofing or noticeable surface weathering may need to be replaced. The fibres of health significance are those that can be inhaled. Also see corrosion where new materials need to be matched with existing ones such as tiles or steel roofing see matching new to existing.

Mastic or bitumen was the most common material used to adhere the stone chip to the pressed metal at that time. For now we recommend care whenever pressed metal roof tiles containing asbestos are or may be present in your workplaces. Some roofing and siding shingles are made of asbestos cement.