Bitumen Asbestos Floor Tile

Bitumen asbestos floor tiles, also known as asphalt asbestos tiles, represent one of the oldest types of resilient flooring. Manufactured from the 1920s through to the mid-1970s, these tiles used a bituminous (asphalt) binder reinforced with chrysotile asbestos fibres at concentrations typically between 20% and 33% by weight. The asbestos served as both a reinforcing filler and a fire retardant, compensating for the inherent flammability and brittleness of the bituminous binder.

Bitumen asbestos tiles preceded vinyl asbestos tiles (VAT) in the marketplace and were the industry standard for resilient flooring in commercial and industrial settings during the post-war period. Factories, warehouses, government offices, schools, hospitals, and military installations across the United Kingdom, United States, Australia, and continental Europe installed these tiles on a massive scale. Brands such as Marley, Kentile, and Flintkote were among the most prominent manufacturers.

Like other asbestos floor tiles, the standard dimension was 9 inches by 9 inches (229 mm x 229 mm), though 12-inch and other metric sizes were also produced. Bitumen tiles tend to be darker than vinyl tiles, with common colours including dark brown, maroon, and black. They are hard, brittle, and susceptible to cracking under impact or when exposed to cold temperatures. The tiles may soften slightly when heated due to the thermoplastic nature of the bitumen binder, and they sometimes emit a faint tar-like odour.

When intact and undisturbed, bitumen asbestos tiles are classified as non-friable and pose low risk. However, the material becomes hazardous when tiles are cracked, chipped, or subject to heavy abrasion. Removal activities such as chipping, scraping, and grinding release asbestos fibres. The black adhesive used to install these tiles also commonly contains asbestos, creating compounded risk. Professional assessment is essential before any work that may disturb bitumen asbestos tiles.