Thermoplastic Asbestos Tile

Thermoplastic asbestos tiles were among the earliest mass-produced resilient floor tiles, widely installed from the 1920s through to the late 1970s. Unlike their successors, vinyl asbestos tiles (VAT), thermoplastic tiles used an asphalt or bituminous binder rather than PVC. Chrysotile asbestos was incorporated at concentrations typically between 15% and 30% by weight, providing strength, dimensional stability, and fire resistance to an otherwise brittle product.

These tiles were the standard commercial flooring solution across schools, hospitals, government buildings, factories, and residential properties throughout the mid-twentieth century. In the United States, brands like Kentile and Flintkote dominated the market, while in the United Kingdom, Marley and Sloane were widely used. The tiles were a staple of post-war reconstruction and the building boom of the 1950s and 1960s.

Thermoplastic tiles are typically found in the standard 9-inch by 9-inch (229 mm x 229 mm) format, although 12-inch variants were also produced. They tend to be darker in colour than vinyl asbestos tiles, with common colours including dark brown, maroon, black, dark green, and charcoal grey. The material is harder and more brittle than vinyl tiles, and tiles may crack or shatter when subjected to impact or temperature changes. Broken tiles and worn surfaces create the greatest risk of asbestos fibre release.

The asphalt binder in thermoplastic tiles makes them sensitive to heat and solvents. Unlike VAT, these tiles may soften or emit odours when exposed to warmth. They are classified as non-friable when intact, meaning the asbestos fibres are bound within the matrix and do not easily become airborne. However, cutting, grinding, breaking, or aggressive removal methods will release respirable asbestos fibres. The black cutback adhesive used to install these tiles is also frequently asbestos-containing, adding a further layer of risk during renovation or demolition work.