In 2012, Industrial Hygene Association of Asia conducted a research to measure the impact of chrysotile on workmen health in the course of dismentalling and installing roof tiles in Thailand. The result has not found any issues in occupational environment of workmen in the course of dismentalling and installing roof tiles. The value of the dust amount on the body of person was found within the range of 0.03-0.08 fibers per 1 cibic centimeter of air (the average value is 0.052 fiber/cu.cm). At the premise, it was found within the range of 0.02-0.10 fiber per 1 cubic centimeter of air (the average value is 0.042 fiber/cu.cm).
Typical test results of air sampling show that fibre concentration is around 0.07 fibre/cc during cutting and installation of chrysotile cement roofing sheets. This is far below the level of 0.5 fibre/cc envisaged. There will be no risk for workmen or carpenters if they follow properly recommended work practices while installing or fixing roofing sheets.