 The successful application of reinforcing fine grain soils using natural or synthetic fibres, including waste human hair fibres, has been demonstrated through free pressure tests on clay soil, CS, samples prepared with different mass ratios of HHF before and after the freezing thawing cycle. The highest strength increases occurred in the mixture of CS plus 1.5 percent HHF, and the increase in pressure stress was remarkably increased with increasing human hair fibre ratio, cure time, and freeze thaw cycles, making the CS reinforced with HHF suitable for use in cold climate zones. This article was authored by Necmiya Basi.