The ban on the supply and use of asbestos is more than 20 years old, but asbestos is still present in around 300,000 non-domestic premises, including more than 80% of schools, and many more homes. The HSE says many thousands of tonnes were used in the past in lagging on plant and pipework; insulation products such as fireproof panels; asbestos cement roofing material; and sprayed coatings on structural steel work to insulate against fire and noise, for example. Much of this material is still in place, although buildings constructed after 2000 are unlikely to contain asbestos materials, it says.