There was a wide variability in the IB test data and some data points were discarded because of specimen failure in the fiber layer immediately load was applied to the sample. To permit an accurate analysis of variance between particleboard types, 32 data points were randomly selected from the acceptable IB data and analysed. A significant difference was observed in IB strength (p = 0.0136) among the fiber reinforced particleboards; the bond strength being significantly higher in the Shive–Flax and Wood–Hemp boards, the second owing to several samples which had comparatively higher
densities. The IB strength of all the board types met the 0.45 MPa ANSI A208.1-1999 requirement for medium density M-2
grade particleboard, with the exception of the Hurd–Hemp boards which barely missed the cut off point based on its lower 5th percentile panel average for ANSI A208.1-2009.