A comprehensive product stewardship program has been instigated by the HTIW industry which includes an extensive monitoring programme. Results show that exposures vary by functional job category and the particular task within the job. Exposures are highest for removal of used ‘after-service’ insulation, perhaps because the HTIW is partly devitrified and so breaks more easy, producing more dust. Measured fibre concentrations have reduced over the years and now average between 0.2 and 0.3 f/ml, although there is substantial variability in fibre concentrations even within a specific job category. Environmental measurements of HTIW (e.g. at the ‘factory fence’) are extremely low - generally below detection limits.