A study was conducted to explore the novel approaches and their attributes in fire performance of wood fibre as insulation materials. Wood fibres typically produced for the medium density fibreboard (MDF) were used as the raw materials. They were treated with different fire retardants in which six (6) of them were commercial products obtained from suppliers and another seven (7) were formulated at the FPInnovations laboratory. The wood fibres were treated with these formulations at two different dosage levels. With an additional virgin wood fibre sample as the control, a total of twenty-seven (27) wood fibre samples were prepared and tested for their fire performance, using the cone calorimeter in accordance with ISO 5660-1 standard. The test results show that both commercial fire retardants and FPI formulations are good candidates suitable as fire retardants for loose fill wood fibre insulation. In general, there are two commercial fire retardants which performed best in heat release rate and effective heat combustion. At the lower dosage of 15%, two FPI formulations (IO2 and IO4) are close to the best of commercial fire retardants studied. Test results, discussion, and conclusion are presented in this report.